# Public sector organisations headquartered in North America

Tamtam tracks 5,042 public sector organisations headquartered in North America. This list ranks the 100 largest by number of employees on LinkedIn, led by US Army, United States Air Force and U.S. Department of Veterans Affairs. Their median headcount is 19,765. Half of them were founded in 1887 or later. The most common headquarters are Washington (5), Columbia (3) and New York (3).

This selection of public sector organizations in North America includes several large government bodies and universities. Among them are the US Army, which focuses on land dominance, the United States Air Force, which protects interests through air and space superiority, and the U.S. Department of Veterans Affairs, dedicated to providing care for veterans. The University of California educates minds and advances research, while UNICEF works globally to support vulnerable children.

The organizations listed primarily represent government administration, armed forces, and higher education. There is a notable concentration of headquarters in Washington, D.C., suggesting its role as a central hub for major federal entities. Other prominent locations include Oakland for the University of California and New York for UNICEF.

🌍 North America · 100 companies · Updated Nov 13, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [US Army](https://www.tamtam.ai/c/us-army) (usarmybasic.com)<br>Providing prompt, sustained land dominance across full military operations spectrum, supporting combatant commanders in national defense and warfare. | Armed Forces | 🇺🇸 Arlington | 367,627 | 1775 |
| 2 | [United States Air Force](https://www.tamtam.ai/c/united-states-air-force) (airforce.com)<br>Protects interests through air and space superiority, conducting global attacks, rapid mobility, precision engagement, information dominance, and agile combat support across multiple dimensions. | Defense and Space Manufacturing | 🇺🇸 Randolph AFB | 243,929 | 1947 |
| 3 | [U.S. Department of Veterans Affairs](https://www.tamtam.ai/c/u-s-department-of-veterans-affairs) (va.gov)<br>Recruitment of skilled employees dedicated to providing respectful and appropriate care and support services for United States veterans. | Government Administration | 🇺🇸 Washington | 202,010 | 1930 |
| 4 | [United States Postal Service](https://www.tamtam.ai/c/united-states-postal-service) (usps.com)<br>Delivers mail and packages to over 157 million addresses nationwide, connecting every American, every door, every business, everywhere, funded by sales, not tax dollars. | Government Administration | 🇺🇸 Washington | 159,003 |  |
| 5 | [University of California](https://www.tamtam.ai/c/university-of-california) (jobs.universityofcalifornia.edu)<br>Educating top minds, advancing research, engaging communities, supporting economy, improving health, protecting environment, and driving innovation across California. | Higher Education | 🇺🇸 Oakland | 152,503 |  |
| 6 | [US Navy](https://www.tamtam.ai/c/us-navy) (navy.mil)<br>This company is responsible for protecting America at sea, defending freedom, preserving prosperity, and keeping the seas open and free | Armed Forces | 🇺🇸 Washington | 150,748 |  |
| 7 | [The California State University](https://www.tamtam.ai/c/the-california-state-university) (calstate.edu)<br>Leading higher education system in California with 23 campuses, offering quality, affordable education and producing job-ready graduates for the workforce | Higher Education | 🇺🇸 Long Beach | 93,821 |  |
| 8 | [State of Minnesota](https://www.tamtam.ai/c/state-of-minnesota) (mn.gov)<br>Employs over 50,000 people across 100+ agencies, impacting Minnesotans through policy, safety, environment, and social services statewide. | Government Administration | 🇺🇸 Saint Paul | 59,508 |  |
| 9 | [UNICEF](https://www.tamtam.ai/c/unicef) (unicef.org)<br>The organization works globally to support the most vulnerable children, saving lives, defending rights, and promoting overall well-being for all | Non-profit Organizations | 🇺🇸 New York | 48,886 | 1946 |
| 10 | [Alberta Health Services](https://www.tamtam.ai/c/alberta-health-services) (albertahealthservices.ca)<br>providing accessible, sustainable, patient-focused health services to over 4.5 million people across Alberta with dedicated professionals | Hospitals and Health Care | 🇨🇦 Edmonton | 46,248 | 2008 |
| 11 | [PEMEX](https://www.tamtam.ai/c/pemex) (pemex.com)<br>A leading Mexican company in the oil industry, involved in exploration, production, distribution, and petrochemicals Major contributor to the country's economy and social development | Oil and Gas | 🇲🇽 Mexico City | 45,692 | 1938 |
| 12 | [The World Bank](https://www.tamtam.ai/c/the-world-bank-group) (worldbank.org)<br>A global institution providing financial and technical assistance to developing countries to reduce poverty and promote sustainable development across various sectors | International Trade and Development | 🇺🇸 Washington | 44,863 | 1944 |
| 13 | [University of Michigan](https://www.tamtam.ai/c/university-of-michigan) (umich.edu)<br>A prestigious institution dedicated to excellence in knowledge, art, and leadership development, serving Michigan and the world for the greater good | Higher Education | 🇺🇸 Ann Arbor | 39,204 | 1817 |
| 14 | [Chicago Public Schools](https://www.tamtam.ai/c/chicago-public-schools) (cps.edu)<br>Provides education to over 340,000 students across more than 600 schools, focusing on college, career, and life readiness. | Education Administration Programs | 🇺🇸 Chicago | 38,314 | 1837 |
| 15 | [Health Service Executive](https://www.tamtam.ai/c/health-service-executive) (hse.ie)<br>Provides safe, high quality health and personal social services to the population of Ireland, aiming for a healthier nation with valued healthcare. | Hospitals and Health Care | 🇲🇽 Dublin | 34,791 | 2005 |
| 16 | [University of Washington](https://www.tamtam.ai/c/university-of-washington) (washington.edu)<br>Public research university offering diverse educational programs, extensive campuses, cultural activities, and high-quality medical care, engaging with communities. | Higher Education | 🇺🇸 Seattle | 32,106 |  |
| 17 | [Penn State University](https://www.tamtam.ai/c/penn-state-university) (psu.edu)<br>Providing interdisciplinary education and resources across multiple campuses, fostering student success and positive global community impact through knowledge and experience. | Higher Education | 🇺🇸 University Park | 31,986 | 1855 |
| 18 | [University of Florida](https://www.tamtam.ai/c/university-of-florida) (ufl.edu)<br>A major public research university in Florida with established programs in international education, research, and service, founded in 1853 | Higher Education | 🇺🇸 Gainesville | 31,315 |  |
| 19 | [University of Wisconsin-Madison](https://www.tamtam.ai/c/university-of-wisconsin-madison) (wisc.edu)<br>A prestigious public university in Madison, offering a wide range of liberal arts studies, professional programs, and student activities on a sprawling campus | Higher Education | 🇺🇸 Madison | 30,836 |  |
| 20 | [The Ohio State University](https://www.tamtam.ai/c/the-ohio-state-university) (osu.edu)<br>Large public university offering extensive research opportunities and multiple regional campuses, serving as a model for Ohio's higher education system. | Higher Education | 🇺🇸 Columbus | 30,775 | 1870 |
| 21 | [Texas A&M University](https://www.tamtam.ai/c/texas-a-and-m-university) (tamu.edu)<br>Public university offering diverse research, military officer training, athletics, and hosting presidential library with strong community values and hospitality. | Higher Education | 🇺🇸 College Station | 30,552 | 1876 |
| 22 | [Arizona State University](https://www.tamtam.ai/c/arizona-state-university) (asu.edu)<br>Public research university focused on student success, groundbreaking research, community impact, and extensive alumni network across multiple campuses. | Higher Education | 🇺🇸 Tempe | 29,921 | 1885 |
| 23 | [Indiana University](https://www.tamtam.ai/c/indiana-university) (iu.edu)<br>Public university system with nine campuses across Indiana, providing diverse educational opportunities and community engagement throughout the state. | Higher Education | 🇺🇸 Bloomington | 29,726 |  |
| 24 | [UCLA](https://www.tamtam.ai/c/ucla) (ucla.edu)<br>A renowned public research university offering diverse academic programs in a picturesque campus location within a thriving global city | Higher Education | 🇺🇸 Los Angeles | 29,540 | 1919 |
| 25 | [University of Toronto](https://www.tamtam.ai/c/university-of-toronto) (defygravitycampaign.utoronto.ca)<br>Leading Canadian university focused on research, innovation, and global education to address pressing societal challenges and prepare students for success | Higher Education | 🇨🇦 Toronto | 28,832 |  |
| 26 | [The National Institutes of Health](https://www.tamtam.ai/c/the-national-institutes-of-health) (nih.gov)<br>Largest public funder of biomedical research investing billions annually to improve health, reduce illness, and support medical breakthroughs worldwide. | Biotechnology Research | 🇺🇸 Bethesda | 28,537 | 1887 |
| 27 | [University of Minnesota](https://www.tamtam.ai/c/university-of-minnesota) (twin-cities.umn.edu)<br>Offers a vast array of baccalaureate, master's, and doctoral degrees across numerous fields at five campuses, providing extensive education and outreach. | Higher Education | 🇺🇸 Minneapolis and St. Paul | 28,030 | 1851 |
| 28 | [University of Missouri System](https://www.tamtam.ai/c/university-of-missouri-system) (umsystem.edu)<br>A prestigious public research institution in Missouri, promoting education, research, and service to serve the state, nation, and beyond | Higher Education | 🇺🇸 Columbia | 26,615 |  |
| 29 | [PT PLN (Persero)](https://www.tamtam.ai/c/pt-pln-persero) (pln.co.id)<br>Sole provider of electricity in Indonesia, striving to improve service quality, with a long history and significant assets in the industry | Utilities | 🇺🇸 Jakarta Selatan | 26,545 | 1945 |
| 30 | [The University of Texas at Austin](https://www.tamtam.ai/c/the-university-of-texas-at-austin) (utexas.edu)<br>A prestigious public university with a large campus, diverse academic programs, and a significant number of students, faculty, and staff | Higher Education | 🇺🇸 Austin | 26,268 | 1883 |
| 31 | [Michigan State University](https://www.tamtam.ai/c/michigan-state-university) (msu.edu)<br>Leading global public university offering over 400 academic programs, fostering education, research, and community engagement with Spartan spirit. | Higher Education | 🇺🇸 East Lansing | 26,149 | 1855 |
| 32 | [Purdue University](https://www.tamtam.ai/c/purdue-university) (purdue.edu)<br>Major research university offering top programs in science, engineering, pharmacy, business, and agriculture with diverse global student community. | Higher Education | 🇺🇸 West Lafayette | 25,360 | 1869 |
| 33 | [The University of British Columbia](https://www.tamtam.ai/c/the-university-of-british-columbia) (ubc.ca)<br>a global center for research and teaching, consistently ranked among the top 20 public universities worldwide. | Higher Education | 🇨🇦 Vancouver | 25,036 |  |
| 34 | [University of Illinois Urbana-Champaign](https://www.tamtam.ai/c/university-of-illinois-urbana-champaign) (illinois.edu)<br>Leading public university with strong focus on education, research, global student opportunities, faculty innovation, and significant economic and community impact. | Higher Education | 🇺🇸 Champaign | 24,692 |  |
| 35 | [University of California, Berkeley](https://www.tamtam.ai/c/university-of-california-berkeley) (berkeley.edu)<br>Public research university offering diverse academic programs, fostering innovation, and serving as a flagship institution in California. | Higher Education | 🇺🇸 Berkeley | 24,082 | 1868 |
| 36 | [Canada Post / Postes Canada](https://www.tamtam.ai/c/canada-post-postes-canada) (canadapost-postescanada.ca)<br>Nationwide postal service with extensive retail network, delivering parcels and mail to over 17 million Canadian addresses. | Freight and Package Transportation | 🇨🇦 Ottawa | 23,941 |  |
| 37 | [University of Kentucky](https://www.tamtam.ai/c/university-of-kentucky) (uky.edu)<br>A public research university dedicated to improving lives through teaching, research, healthcare, cultural enrichment, and economic development for over 150 years | Higher Education | 🇺🇸 Lexington | 23,783 | 1865 |
| 38 | [Clark County School District](https://www.tamtam.ai/c/clark-county-school-district) (recruitment.ccsd.net)<br>Public school district serving over 300,000 students with diverse programs, including magnet and career academies, focused on academic excellence. | Education Administration Programs | 🇺🇸 Las Vegas | 23,773 | 1956 |
| 39 | [UT MD Anderson](https://www.tamtam.ai/c/ut-md-anderson) (mdanderson.org)<br>A leading cancer center focused on patient care, research, education, and prevention, with top rankings in cancer care and a mission to #EndCancer | Hospitals and Health Care | 🇺🇸 Houston | 23,100 | 1944 |
| 40 | [UC San Diego](https://www.tamtam.ai/c/uc-san-diego) (ucsd.edu)<br>A globally renowned research university fostering collaboration, driving discoveries, and equipping students to solve pressing global issues as changemakers | Higher Education | 🇺🇸 La Jolla | 22,205 |  |
| 41 | [University of Maryland](https://www.tamtam.ai/c/university-of-maryland) (umd.edu)<br>Public research university emphasizing hands-on learning, interdisciplinary collaboration, innovation, entrepreneurship, and global citizenship through diverse academic and research opportunities. | Higher Education | 🇺🇸 College Park | 21,670 |  |
| 42 | [University of California, Davis](https://www.tamtam.ai/c/university-of-california-davis) (ucdavis.edu)<br>Public university offering diverse undergraduate and graduate programs, conducting extensive research, fostering innovation, and preparing future leaders across multiple disciplines. | Higher Education | 🇺🇸 Davis | 21,439 | 1908 |
| 43 | [Miami-Dade County Public Schools](https://www.tamtam.ai/c/miami-dade-county-public-schools) (dadeschools.net)<br>Public school district providing education services to students in Miami-Dade County, Florida, operating numerous schools and educational programs. | Education | 🇺🇸 Miami | 21,425 | 1885 |
| 44 | [Metropolitan Transportation Authority](https://www.tamtam.ai/c/metropolitan-transportation-authority) (mta.info)<br>North America's largest transportation network providing bus, subway, and commuter rail services for millions of people in New York City and surrounding areas | Urban Transit Services | 🇺🇸 New York | 21,333 |  |
| 45 | [University of Arizona](https://www.tamtam.ai/c/university-of-arizona) (arizona.edu)<br>Leading public research university in the American Southwest, enriching communities with top-notch research, resources, and career-focused education Your investment in yourself | Higher Education | 🇺🇸 Tucson | 21,024 |  |
| 46 | [North Carolina State University](https://www.tamtam.ai/c/north-carolina-state-university) (ncsu.edu)<br>Comprehensive university specializing in STEM education and research, committed to improving quality of life locally and globally through innovation. | Higher Education | 🇺🇸 Raleigh | 20,729 | 1887 |
| 47 | [Fairfax County Public Schools](https://www.tamtam.ai/c/fairfax-county-public-schools) (fcps.edu)<br>Serving over 180,000 students from prekindergarten to grade 12 with extensive staff support and advanced educational resources. | Primary and Secondary Education | 🇺🇸 Falls Church | 20,574 |  |
| 48 | [Canadian Armed Forces \| Forces armées canadiennes](https://www.tamtam.ai/c/canadian-armed-forces-forces-armees-canadiennes) (forces.ca)<br>Offering over 100 trades, the organization provides world-class qualifications, competitive salaries, benefits, stability, and exciting opportunities for travel, adventure, and making a difference | Armed Forces | 🇨🇦 Ottawa | 20,412 |  |
| 49 | [The University of North Carolina at Chapel Hill](https://www.tamtam.ai/c/the-university-of-north-carolina-at-chapel-hill) (unc.edu)<br>A leading public university known for its vibrant community, diverse student body, academic excellence, and unmatched value in higher education | Higher Education | 🇺🇸 Chapel Hill | 20,098 |  |
| 50 | [Georgia Institute of Technology](https://www.tamtam.ai/c/georgia-institute-of-technology) (gatech.edu)<br>Focused technological education and research for over 25,000 students across multiple colleges, fostering innovation through numerous research centers. | Higher Education | 🇺🇸 Atlanta | 19,765 | 1888 |
| 51 | [University of Pittsburgh](https://www.tamtam.ai/c/university-of-pittsburgh) (pitt.edu)<br>Top-ranked public institution in Pennsylvania, member of leading research universities Known for innovative discoveries and shaping future paths | Higher Education | 🇺🇸 Pittsburgh | 19,349 | 1787 |
| 52 | [UT Southwestern Medical Center](https://www.tamtam.ai/c/ut-southwestern-medical-center) (utsouthwestern.edu)<br>An academic medical center with top research, education, and patient care; offering training to students and providing specialized healthcare services | Hospitals and Health Care | 🇺🇸 Dallas | 19,275 | 1943 |
| 53 | [University of South Florida](https://www.tamtam.ai/c/university-of-south-florida) (usf.edu)<br>A metropolitan research university with campuses in Tampa Bay, offering undergraduate, graduate, and professional degrees, innovative research, and a world-class educational experience | Higher Education | 🇺🇸 Tampa | 19,255 | 1956 |
| 54 | [U.S. Air Force Reserve](https://www.tamtam.ai/c/u-s-air-force-reserve) (airforce.com)<br>Supports US air defense and military missions, leveraging reservists' civilian skills and expertise for critical operations and training globally, alongside active-duty members. | Armed Forces | 🇺🇸 Robins AFB | 19,030 | 1948 |
| 55 | [Rutgers University](https://www.tamtam.ai/c/rutgers-university) (rutgers.edu)<br>Leading institution for higher education in New Jersey, offering a wide range of undergraduate, graduate, and professional degree programs across various departments and schools | Higher Education | 🇺🇸 New Brunswick | 18,394 | 1766 |
| 56 | [Instituto Mexicano del Seguro Social](https://www.tamtam.ai/c/instituto-mexicano-del-seguro-social)<br>An institution in Mexico providing health care and social protection since 1943, focusing on research, medical practice, and retirement resources for workers and families | Hospitals and Health Care | 🇲🇽 Mexico City | 18,149 | 1943 |
| 57 | [Amtrak](https://www.tamtam.ai/c/amtrak) (amtrak.com)<br>Operates a vast passenger rail network, connecting communities across the United States and parts of Canada, providing safe and efficient transportation to over 500 destinations daily. | Rail Transportation | 🇺🇸 Washington | 18,000 | 1971 |
| 58 | [University of Illinois Chicago](https://www.tamtam.ai/c/university-of-illinois-chicago) (uic.edu)<br>A large university in Chicago with 33,000 students, 12,000 employees, 16 colleges, and a public medical center | Higher Education | 🇺🇸 Chicago | 17,943 | 1965 |
| 59 | [The University of Georgia](https://www.tamtam.ai/c/the-university-of-georgia) (uga.edu)<br>Public research university providing diverse educational programs, serving state-wide commitments, and preserving intellectual, cultural, and environmental heritage. | Higher Education | 🇺🇸 Athens | 17,591 |  |
| 60 | [Colorado State University](https://www.tamtam.ai/c/colorado-state-university) (colostate.edu)<br>Offers over 250 academic programs, conducts world-class research in various scientific fields, and provides top-ranked professional programs. | Higher Education | 🇺🇸 Fort Collins | 17,537 | 1870 |
| 61 | [Oregon Health & Science University](https://www.tamtam.ai/c/oregon-health-and-science-university) (ohsu.edu)<br>Research and education focused on disease understanding, treatment innovations, and training future health professionals across various medical fields. | Hospitals and Health Care | 🇺🇸 Portland | 17,535 | 1887 |
| 62 | [The School District of Palm Beach County](https://www.tamtam.ai/c/the-school-district-of-palm-beach-county) (palmbeachschools.org)<br>A large school district in Palm Beach County with 180 schools, 170,000+ students, and over 23,000 employees, including 13,000+ teachers | Education Administration Programs | 🇺🇸 West Palm Beach | 17,353 | 1909 |
| 63 | [Transportation Security Administration (TSA)](https://www.tamtam.ai/c/transportation-security-administration-tsa) (tsa.gov)<br>The company is a component of the US Department of Homeland Security, working to protect transportation systems and ensure freedom of movement for people and commerce | Government Administration | 🇺🇸 Arlington | 17,262 | 2001 |
| 64 | [University of Alabama at Birmingham](https://www.tamtam.ai/c/university-of-alabama-at-birmingham) (uab.edu)<br>Educates students, conducts research, provides patient care, fosters innovation, and engages with the community, significantly impacting the state's economy. | Higher Education | 🇺🇸 Birmingham | 16,963 | 1969 |
| 65 | [University of Cincinnati](https://www.tamtam.ai/c/university-of-cincinnati) (uc.edu)<br>Public research university combining academic excellence with cooperative education, producing impactful discoveries and significant regional economic contributions. | Higher Education | 🇺🇸 Cincinnati | 16,727 | 1819 |
| 66 | [University of Virginia](https://www.tamtam.ai/c/university-of-virginia) (virginia.edu)<br>A renowned institution of higher learning, focused on meeting challenges, promoting access, and preparing citizen-leaders with empathy, integrity, and truth #GreatandGood | Higher Education | 🇺🇸 Charlottesville | 16,633 | 1819 |
| 67 | [Dallas Independent School District](https://www.tamtam.ai/c/dallas-independent-school-district) (dallasisd.org)<br>This education organization in Dallas boasts top high schools, National Blue Ribbon Schools, and increasing graduation rates, focusing on student success | Primary and Secondary Education | 🇺🇸 Dallas | 16,232 |  |
| 68 | [University of Alberta](https://www.tamtam.ai/c/university-of-alberta) (ualberta.ca)<br>Top Canadian university offering a wide range of programs in various disciplines, dedicated to using knowledge for the benefit of society | Higher Education | 🇨🇦 Edmonton | 16,185 | 1908 |
| 69 | [Hydro Québec](https://www.tamtam.ai/c/hydro-quebec) (hydroquebec.com)<br>Production, transmission, and distribution of electricity primarily from renewable hydroelectric sources, including research and technology development in energy efficiency. | Renewable Energy Power Generation | 🇨🇦 Montreal | 16,160 | 1944 |
| 70 | [Montgomery County Public Schools](https://www.tamtam.ai/c/montgomery-county-public-schools) (montgomeryschoolsmd.org)<br>A large school district in Maryland serving over 160,000 students, offering competitive salaries, benefits, and a commitment to diversity Hiring for excellence | Primary and Secondary Education | 🇺🇸 Rockville | 16,138 |  |
| 71 | [Fraser Health Authority](https://www.tamtam.ai/c/fraser-health-authority) (fraserhealth.ca)<br>Provider of healthcare services in the Fraser Salish region, operating on the traditional lands of Coast Salish and Nlaka’pamux Nations | Hospitals and Health Care | 🇨🇦 Surrey | 16,049 | 2001 |
| 72 | [The Ohio State University Wexner Medical Center](https://www.tamtam.ai/c/the-ohio-state-university-wexner-medical-center) (wexnermedical.osu.edu)<br>Academic medical center providing personalized patient care, medical education, research innovation, and extensive healthcare services across multiple specialties. | Hospitals and Health Care | 🇺🇸 Columbus | 15,993 | 1834 |
| 73 | [The School District of Philadelphia](https://www.tamtam.ai/c/the-school-district-of-philadelphia) (philasd.org)<br>Providing high-quality education to diverse students, ensuring academic success, lifelong learning, and preparation for productive societal roles. | Education Administration Programs | 🇺🇸 Philadelphia | 15,950 |  |
| 74 | [Florida State University](https://www.tamtam.ai/c/florida-state-university) (news.fsu.edu)<br>A prestigious academic institution offering nationally-ranked academics, renowned faculty, championship athletics, and a wide array of undergraduate and graduate programs | Higher Education | 🇺🇸 Tallahassee | 15,872 |  |
| 75 | [Medical University of South Carolina](https://www.tamtam.ai/c/medical-university-of-south-carolina) (musc.edu)<br>Public institution focused on educating healthcare professionals, conducting biomedical research, and providing comprehensive healthcare services in South Carolina and beyond. | Hospitals and Health Care | 🇺🇸 Charleston | 15,845 | 1824 |
| 76 | [University of Colorado Boulder](https://www.tamtam.ai/c/university-of-colorado-boulder) (colorado.edu)<br>A dynamic community of scholars and learners at a Colorado university, known for its spectacular campus and academic excellence | Higher Education | 🇺🇸 Boulder | 15,809 | 1876 |
| 77 | [Charlotte-Mecklenburg Schools](https://www.tamtam.ai/c/charlotte-mecklenburg-schools) (cmsk12.org)<br>A public school system in Charlotte, NC region providing rigorous academic instruction, support, and diverse programs to prepare students for success | Primary and Secondary Education | 🇺🇸 Charlotte | 15,780 | 1882 |
| 78 | [University of Central Florida](https://www.tamtam.ai/c/university-of-central-florida) (ucf.edu)<br>Public university offering over 230 degree programs across multiple campuses and online, fostering community and industry engagement. | Higher Education | 🇺🇸 Orlando | 15,722 |  |
| 79 | [Virginia Tech](https://www.tamtam.ai/c/virginia-tech) (vt.edu)<br>Comprehensive university offering diverse degree programs, leading research initiatives, and driving technological innovation and economic growth regionally. | Higher Education | 🇺🇸 Blacksburg | 15,504 | 1872 |
| 80 | [McGill University](https://www.tamtam.ai/c/mcgill-university) (mcgill.ca)<br>Leading research-intensive university with diverse international students, multiple campuses, extensive programs, and partnerships with teaching hospitals for healthcare education. | Higher Education | 🇨🇦 Montreal | 15,235 | 1821 |
| 81 | [University of Missouri-Columbia](https://www.tamtam.ai/c/university-of-missouri-columbia) (missouri.edu)<br>State-supported research university providing education, advancing arts, sciences, and professions, focusing on public service and economic development. | Higher Education | 🇺🇸 Columbia | 14,879 |  |
| 82 | [University of Calgary](https://www.tamtam.ai/c/university-of-calgary) (ucalgary.ca)<br>A leading Canadian university in Calgary focused on becoming one of the top five research universities, emphasizing research, teaching, and community engagement | Higher Education | 🇨🇦 Calgary | 14,818 | 1966 |
| 83 | [Michigan Medicine](https://www.tamtam.ai/c/michigan-medicine) (uofmhealth.org)<br>A premier academic medical center with state-of-the-art facilities, focused on scientific discovery, education, compassionate care, health care reform, and biomedical innovation | Hospitals and Health Care | 🇺🇸 Ann Arbor | 14,798 | 1850 |
| 84 | [UC Irvine](https://www.tamtam.ai/c/uc-irvine) (uci.edu)<br>A top public research university in Southern California committed to rigorous academics, cutting-edge research, and leadership development with global impact | Higher Education | 🇺🇸 Irvine | 14,695 | 1965 |
| 85 | [Broward County Public Schools](https://www.tamtam.ai/c/broward-county-public-schools) (browardschools.com)<br>One of the largest fully accredited K-12 and adult school districts in the US with over 260,000 students across 229 schools | Education Administration Programs | 🇺🇸 Fort Lauderdale | 14,631 |  |
| 86 | [University of Iowa](https://www.tamtam.ai/c/university-of-iowa) (jobs.uiowa.edu)<br>Top public research university in Iowa with diverse community and advanced technology, offering cultural, educational, and recreational activities on a scenic campus | Higher Education | 🇺🇸 Iowa City | 14,628 | 1847 |
| 87 | [CBC/Radio-Canada](https://www.tamtam.ai/c/cbc-radio-canada) (cbc.radio-canada.ca)<br>Canadian public broadcaster promoting Canadian culture through diverse programming in multiple languages, supporting creative work and job opportunities in television production | Broadcast Media Production and Distribution | 🇨🇦 Ottawa | 14,336 |  |
| 88 | [Oregon State University](https://www.tamtam.ai/c/oregon-state-university) (oregonstate.edu)<br>Public university offering diverse academic programs, conducting research, and fostering community engagement with a strong identity as Beaver Nation. | Higher Education | 🇺🇸 Corvallis | 14,096 | 1868 |
| 89 | [University of Connecticut](https://www.tamtam.ai/c/university-of-connecticut) (uconn.edu)<br>A renowned public university with 32,000 students, offering a variety of undergraduate, graduate, and professional degree programs across multiple schools and colleges | Higher Education | 🇺🇸 Storrs | 14,027 |  |
| 90 | [NYC Health + Hospitals](https://www.tamtam.ai/c/nyc-health-hospitals) (nychealthandhospitals.org)<br>The nation's largest public health care delivery system, providing essential services to New Yorkers through an integrated network of hospitals, health centers, and home care. | Hospitals and Health Care | 🇺🇸 New York | 13,705 |  |
| 91 | [Caja Costarricense de Seguro Social (CCSS)](https://www.tamtam.ai/c/caja-costarricense-de-seguro-social-ccss) (ccss.sa.cr)<br>A Costa Rican organization that provides comprehensive healthcare services and social protection to the population, as mandated by current legislation | Hospitals and Health Care | 🇺🇸 San Jose | 13,662 | 1941 |
| 92 | [Los Alamos National Laboratory](https://www.tamtam.ai/c/los-alamos-national-laboratory) (lanl.gov)<br>Multidisciplinary research institution focused on national security, nuclear stockpile safety, and advanced science in space, energy, computing, medicine, and nanotechnology. | Research Services | 🇺🇸 Los Alamos | 13,603 | 1943 |
| 93 | [Oklahoma State University](https://www.tamtam.ai/c/oklahoma-state-university) (go.okstate.edu)<br>Delivering education, research, and community engagement in alignment with a land-grant mission for over a century | Higher Education | 🇺🇸 Stillwater | 13,451 | 1890 |
| 94 | [University of South Carolina](https://www.tamtam.ai/c/university-of-south-carolina) (sc.edu)<br>A globally recognized research university offering 324 degree programs, top-tier research, community engagement, and numerous nationally ranked programs in South Carolina | Higher Education | 🇺🇸 Columbia | 13,337 | 1801 |
| 95 | [University of Nebraska System](https://www.tamtam.ai/c/university-of-nebraska-system) (nebraska.edu)<br>Public university system with four campuses offering undergraduate, metropolitan, medical, and flagship land-grant education and research in Nebraska. | Higher Education | 🇺🇸 Lincoln | 13,314 |  |
| 96 | [Jefferson County Public Schools](https://www.tamtam.ai/c/jefferson-county-public-schools) (jefferson.kyschools.us)<br>An educational institution serving over 96,000 students with a focus on personalized learning, diversity, excellence, and collaboration to empower students for success | Education Administration Programs | 🇺🇸 Louisville | 13,233 | 1829 |
| 97 | [The University of Alabama](https://www.tamtam.ai/c/the-university-of-alabama) (ua.edu)<br>Public university focused on teaching, research, and service, providing a creative environment for students and scholars to excel. | Higher Education | 🇺🇸 Tuscaloosa | 13,215 | 1831 |
| 98 | [McMaster University](https://www.tamtam.ai/c/mcmaster-university) (mcmaster.ca)<br>Leading Canadian university known for innovation in education and research, serving 30,000 students and a global alumni network. | Higher Education | 🇨🇦 Hamilton | 13,160 | 1887 |
| 99 | [University of North Texas](https://www.tamtam.ai/c/university-of-north-texas) (unt.edu)<br>A leading public research university with a focus on creativity, innovation, entrepreneurship, offering a wide range of academic programs and degrees | Higher Education | 🇺🇸 Denton | 12,980 | 1890 |
| 100 | [Air National Guard](https://www.tamtam.ai/c/air-national-guard) (airforce.com)<br>Provides part-time military service with high-tech career training, college tuition assistance, and federal benefits while serving in local units near home. | Armed Forces | 🇺🇸 Horsham | 12,937 |  |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 13, 2026.

## More company lists in North America

- [The largest companies in North America](https://www.tamtam.ai/l/largest-companies-in-north-america) (119,525)
- [Multinational companies in North America](https://www.tamtam.ai/l/multinational-companies-in-north-america) (18,655)
- [Manufacturers in North America](https://www.tamtam.ai/l/manufacturers-in-north-america) (10,136)
- [Education providers in North America](https://www.tamtam.ai/l/education-companies-in-north-america) (8,464)
- [Retail chains in North America](https://www.tamtam.ai/l/retail-chains-in-north-america) (8,233)
- [Financial services firms in North America](https://www.tamtam.ai/l/financial-services-firms-in-north-america) (7,767)
- [Companies with in-house R&D in North America](https://www.tamtam.ai/l/r-and-d-companies-in-north-america) (7,617)
- [Critical infrastructure operators in North America](https://www.tamtam.ai/l/critical-infrastructure-operators-in-north-america) (6,768)
- [Hardware manufacturers in North America](https://www.tamtam.ai/l/hardware-companies-in-north-america) (5,983)
- [Financial Services companies in North America](https://www.tamtam.ai/l/financial-services-companies-in-north-america) (5,618)
- [Higher Education companies in North America](https://www.tamtam.ai/l/higher-education-companies-in-north-america) (3,953)
- [Construction companies in North America](https://www.tamtam.ai/l/construction-companies-in-north-america) (3,792)
- [Energy companies in North America](https://www.tamtam.ai/l/energy-companies-in-north-america) (3,542)
- [Publicly traded companies in North America](https://www.tamtam.ai/l/publicly-traded-companies-in-north-america) (3,538)
- [Family-owned companies in North America](https://www.tamtam.ai/l/family-owned-companies-in-north-america) (3,387)
- [Corporate groups and holding companies in North America](https://www.tamtam.ai/l/holding-companies-in-north-america) (3,311)
- [Distributors and wholesalers in North America](https://www.tamtam.ai/l/distributors-and-wholesalers-in-north-america) (3,208)
- [Hotel and hospitality groups in North America](https://www.tamtam.ai/l/hospitality-groups-in-north-america) (3,149)
- [E-commerce companies in North America](https://www.tamtam.ai/l/ecommerce-companies-in-north-america) (2,944)
- [Logistics companies in North America](https://www.tamtam.ai/l/logistics-companies-in-north-america) (2,701)
- [Insurance companies in North America](https://www.tamtam.ai/l/insurance-companies-in-north-america) (2,622)
- [Government Administration companies in North America](https://www.tamtam.ai/l/government-administration-companies-in-north-america) (2,495)
- [Retail companies in North America](https://www.tamtam.ai/l/retail-companies-in-north-america) (2,407)
- [Contract manufacturers in North America](https://www.tamtam.ai/l/contract-manufacturers-in-north-america) (2,377)

## The same list elsewhere

- [Public sector organisations in the world](https://www.tamtam.ai/l/public-sector-organisations-in-the-world) (18,492)
- [Public sector organisations in the United States](https://www.tamtam.ai/l/public-sector-organisations-united-states) (4,151)
- [Public sector organisations in Canada](https://www.tamtam.ai/l/public-sector-organisations-canada) (698)
- [Public sector organisations in Mexico](https://www.tamtam.ai/l/public-sector-organisations-mexico) (193)

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Source: https://www.tamtam.ai/l/public-sector-organisations-in-north-america