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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
US Armyusarmybasic.com
Providing prompt, sustained land dominance across full military operations spectrum, supporting combatant commanders in national defense and warfare. |
367,627 | |||
| 2 |
United States Air Forceairforce.com
Protects interests through air and space superiority, conducting global attacks, rapid mobility, precision engagement, information dominance, and agile combat support across multiple dimensions. |
243,929 | |||
| 3 |
U.S. Department of Veterans Affairsva.gov
Recruitment of skilled employees dedicated to providing respectful and appropriate care and support services for United States veterans. |
202,010 | |||
| 4 |
United States Postal Serviceusps.com
Delivers mail and packages to over 157 million addresses nationwide, connecting every American, every door, every business, everywhere, funded by sales, not tax dollars. |
159,003 | |||
| 5 |
University of Californiajobs.universityofcalifornia.edu
Educating top minds, advancing research, engaging communities, supporting economy, improving health, protecting environment, and driving innovation across California. |
152,503 | |||
| 6 | 150,748 | ||||
| 7 |
The California State Universitycalstate.edu
Leading higher education system in California with 23 campuses, offering quality, affordable education and producing job-ready graduates for the workforce |
93,821 | |||
| 8 |
State of Minnesotamn.gov
Employs over 50,000 people across 100+ agencies, impacting Minnesotans through policy, safety, environment, and social services statewide. |
59,508 | |||
| 9 |
UNICEFunicef.org
The organization works globally to support the most vulnerable children, saving lives, defending rights, and promoting overall well-being for all |
48,886 | |||
| 10 |
Alberta Health Servicesalbertahealthservices.ca
providing accessible, sustainable, patient-focused health services to over 4.5 million people across Alberta with dedicated professionals |
46,248 | |||
| 11 | 45,692 | ||||
| 12 |
The World Bankworldbank.org
A global institution providing financial and technical assistance to developing countries to reduce poverty and promote sustainable development across various sectors |
44,863 | |||
| 13 |
University of Michiganumich.edu
A prestigious institution dedicated to excellence in knowledge, art, and leadership development, serving Michigan and the world for the greater good |
39,204 | |||
| 14 |
Chicago Public Schoolscps.edu
Provides education to over 340,000 students across more than 600 schools, focusing on college, career, and life readiness. |
38,314 | |||
| 15 |
Health Service Executivehse.ie
Provides safe, high quality health and personal social services to the population of Ireland, aiming for a healthier nation with valued healthcare. |
34,791 | |||
| 16 |
University of Washingtonwashington.edu
Public research university offering diverse educational programs, extensive campuses, cultural activities, and high-quality medical care, engaging with communities. |
32,106 | |||
| 17 |
Penn State Universitypsu.edu
Providing interdisciplinary education and resources across multiple campuses, fostering student success and positive global community impact through knowledge and experience. |
31,986 | |||
| 18 |
University of Floridaufl.edu
A major public research university in Florida with established programs in international education, research, and service, founded in 1853 |
31,315 | |||
| 19 |
University of Wisconsin-Madisonwisc.edu
A prestigious public university in Madison, offering a wide range of liberal arts studies, professional programs, and student activities on a sprawling campus |
30,836 | |||
| 20 |
The Ohio State Universityosu.edu
Large public university offering extensive research opportunities and multiple regional campuses, serving as a model for Ohio's higher education system. |
30,775 | |||
| 21 |
Texas A&M Universitytamu.edu
Public university offering diverse research, military officer training, athletics, and hosting presidential library with strong community values and hospitality. |
30,552 | |||
| 22 |
Arizona State Universityasu.edu
Public research university focused on student success, groundbreaking research, community impact, and extensive alumni network across multiple campuses. |
29,921 | |||
| 23 |
Indiana Universityiu.edu
Public university system with nine campuses across Indiana, providing diverse educational opportunities and community engagement throughout the state. |
29,726 | |||
| 24 | 29,540 | ||||
| 25 |
University of Torontodefygravitycampaign.utoronto.ca
Leading Canadian university focused on research, innovation, and global education to address pressing societal challenges and prepare students for success |
28,832 | |||
| 26 |
The National Institutes of Healthnih.gov
Largest public funder of biomedical research investing billions annually to improve health, reduce illness, and support medical breakthroughs worldwide. |
28,537 | |||
| 27 |
University of Minnesotatwin-cities.umn.edu
Offers a vast array of baccalaureate, master's, and doctoral degrees across numerous fields at five campuses, providing extensive education and outreach. |
28,030 | |||
| 28 |
University of Missouri Systemumsystem.edu
A prestigious public research institution in Missouri, promoting education, research, and service to serve the state, nation, and beyond |
26,615 | |||
| 29 |
PT PLN (Persero)pln.co.id
Sole provider of electricity in Indonesia, striving to improve service quality, with a long history and significant assets in the industry |
26,545 | |||
| 30 |
The University of Texas at Austinutexas.edu
A prestigious public university with a large campus, diverse academic programs, and a significant number of students, faculty, and staff |
26,268 | |||
| 31 |
Michigan State Universitymsu.edu
Leading global public university offering over 400 academic programs, fostering education, research, and community engagement with Spartan spirit. |
26,149 | |||
| 32 |
Purdue Universitypurdue.edu
Major research university offering top programs in science, engineering, pharmacy, business, and agriculture with diverse global student community. |
25,360 | |||
| 33 |
The University of British Columbiaubc.ca
a global center for research and teaching, consistently ranked among the top 20 public universities worldwide. |
25,036 | |||
| 34 |
University of Illinois Urbana-Champaignillinois.edu
Leading public university with strong focus on education, research, global student opportunities, faculty innovation, and significant economic and community impact. |
24,692 | |||
| 35 |
University of California, Berkeleyberkeley.edu
Public research university offering diverse academic programs, fostering innovation, and serving as a flagship institution in California. |
24,082 | |||
| 36 |
Canada Post / Postes Canadacanadapost-postescanada.ca
Nationwide postal service with extensive retail network, delivering parcels and mail to over 17 million Canadian addresses. |
23,941 | |||
| 37 |
University of Kentuckyuky.edu
A public research university dedicated to improving lives through teaching, research, healthcare, cultural enrichment, and economic development for over 150 years |
23,783 | |||
| 38 |
Clark County School Districtrecruitment.ccsd.net
Public school district serving over 300,000 students with diverse programs, including magnet and career academies, focused on academic excellence. |
23,773 | |||
| 39 |
UT MD Andersonmdanderson.org
A leading cancer center focused on patient care, research, education, and prevention, with top rankings in cancer care and a mission to #EndCancer |
23,100 | |||
| 40 |
UC San Diegoucsd.edu
A globally renowned research university fostering collaboration, driving discoveries, and equipping students to solve pressing global issues as changemakers |
22,205 | |||
| 41 |
University of Marylandumd.edu
Public research university emphasizing hands-on learning, interdisciplinary collaboration, innovation, entrepreneurship, and global citizenship through diverse academic and research opportunities. |
21,670 | |||
| 42 |
University of California, Davisucdavis.edu
Public university offering diverse undergraduate and graduate programs, conducting extensive research, fostering innovation, and preparing future leaders across multiple disciplines. |
21,439 | |||
| 43 |
Miami-Dade County Public Schoolsdadeschools.net
Public school district providing education services to students in Miami-Dade County, Florida, operating numerous schools and educational programs. |
21,425 | |||
| 44 |
Metropolitan Transportation Authoritymta.info
North America's largest transportation network providing bus, subway, and commuter rail services for millions of people in New York City and surrounding areas |
21,333 | |||
| 45 |
University of Arizonaarizona.edu
Leading public research university in the American Southwest, enriching communities with top-notch research, resources, and career-focused education Your investment in yourself |
21,024 | |||
| 46 |
North Carolina State Universityncsu.edu
Comprehensive university specializing in STEM education and research, committed to improving quality of life locally and globally through innovation. |
20,729 | |||
| 47 |
Fairfax County Public Schoolsfcps.edu
Serving over 180,000 students from prekindergarten to grade 12 with extensive staff support and advanced educational resources. |
20,574 | |||
| 48 |
Canadian Armed Forces | Forces armรฉes canadiennesforces.ca
Offering over 100 trades, the organization provides world-class qualifications, competitive salaries, benefits, stability, and exciting opportunities for travel, adventure, and making a difference |
20,412 | |||
| 49 |
The University of North Carolina at Chapel Hillunc.edu
A leading public university known for its vibrant community, diverse student body, academic excellence, and unmatched value in higher education |
20,098 | |||
| 50 |
Georgia Institute of Technologygatech.edu
Focused technological education and research for over 25,000 students across multiple colleges, fostering innovation through numerous research centers. |
19,765 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 51 |
University of Pittsburghpitt.edu
Top-ranked public institution in Pennsylvania, member of leading research universities Known for innovative discoveries and shaping future paths |
19,349 | |||
| 52 |
UT Southwestern Medical Centerutsouthwestern.edu
An academic medical center with top research, education, and patient care; offering training to students and providing specialized healthcare services |
19,275 | |||
| 53 |
University of South Floridausf.edu
A metropolitan research university with campuses in Tampa Bay, offering undergraduate, graduate, and professional degrees, innovative research, and a world-class educational experience |
19,255 | |||
| 54 |
U.S. Air Force Reserveairforce.com
Supports US air defense and military missions, leveraging reservists' civilian skills and expertise for critical operations and training globally, alongside active-duty members. |
19,030 | |||
| 55 |
Rutgers Universityrutgers.edu
Leading institution for higher education in New Jersey, offering a wide range of undergraduate, graduate, and professional degree programs across various departments and schools |
18,394 | |||
| 56 |
Instituto Mexicano del Seguro Social
An institution in Mexico providing health care and social protection since 1943, focusing on research, medical practice, and retirement resources for workers and families |
18,149 | |||
| 57 |
Amtrakamtrak.com
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. |
18,000 | |||
| 58 |
University of Illinois Chicagouic.edu
A large university in Chicago with 33,000 students, 12,000 employees, 16 colleges, and a public medical center |
17,943 | |||
| 59 |
The University of Georgiauga.edu
Public research university providing diverse educational programs, serving state-wide commitments, and preserving intellectual, cultural, and environmental heritage. |
17,591 | |||
| 60 |
Colorado State Universitycolostate.edu
Offers over 250 academic programs, conducts world-class research in various scientific fields, and provides top-ranked professional programs. |
17,537 | |||
| 61 |
Oregon Health & Science Universityohsu.edu
Research and education focused on disease understanding, treatment innovations, and training future health professionals across various medical fields. |
17,535 | |||
| 62 |
The School District of Palm Beach Countypalmbeachschools.org
A large school district in Palm Beach County with 180 schools, 170,000+ students, and over 23,000 employees, including 13,000+ teachers |
17,353 | |||
| 63 |
Transportation Security Administration (TSA)tsa.gov
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 |
17,262 | |||
| 64 |
University of Alabama at Birminghamuab.edu
Educates students, conducts research, provides patient care, fosters innovation, and engages with the community, significantly impacting the state's economy. |
16,963 | |||
| 65 |
University of Cincinnatiuc.edu
Public research university combining academic excellence with cooperative education, producing impactful discoveries and significant regional economic contributions. |
16,727 | |||
| 66 |
University of Virginiavirginia.edu
A renowned institution of higher learning, focused on meeting challenges, promoting access, and preparing citizen-leaders with empathy, integrity, and truth #GreatandGood |
16,633 | |||
| 67 |
Dallas Independent School Districtdallasisd.org
This education organization in Dallas boasts top high schools, National Blue Ribbon Schools, and increasing graduation rates, focusing on student success |
16,232 | |||
| 68 |
University of Albertaualberta.ca
Top Canadian university offering a wide range of programs in various disciplines, dedicated to using knowledge for the benefit of society |
16,185 | |||
| 69 |
Hydro Quรฉbechydroquebec.com
Production, transmission, and distribution of electricity primarily from renewable hydroelectric sources, including research and technology development in energy efficiency. |
16,160 | |||
| 70 |
Montgomery County Public Schoolsmontgomeryschoolsmd.org
A large school district in Maryland serving over 160,000 students, offering competitive salaries, benefits, and a commitment to diversity Hiring for excellence |
16,138 | |||
| 71 |
Fraser Health Authorityfraserhealth.ca
Provider of healthcare services in the Fraser Salish region, operating on the traditional lands of Coast Salish and Nlakaโpamux Nations |
16,049 | |||
| 72 |
The Ohio State University Wexner Medical Centerwexnermedical.osu.edu
Academic medical center providing personalized patient care, medical education, research innovation, and extensive healthcare services across multiple specialties. |
15,993 | |||
| 73 |
The School District of Philadelphiaphilasd.org
Providing high-quality education to diverse students, ensuring academic success, lifelong learning, and preparation for productive societal roles. |
15,950 | |||
| 74 |
Florida State Universitynews.fsu.edu
A prestigious academic institution offering nationally-ranked academics, renowned faculty, championship athletics, and a wide array of undergraduate and graduate programs |
15,872 | |||
| 75 |
Medical University of South Carolinamusc.edu
Public institution focused on educating healthcare professionals, conducting biomedical research, and providing comprehensive healthcare services in South Carolina and beyond. |
15,845 | |||
| 76 |
University of Colorado Bouldercolorado.edu
A dynamic community of scholars and learners at a Colorado university, known for its spectacular campus and academic excellence |
15,809 | |||
| 77 |
Charlotte-Mecklenburg Schoolscmsk12.org
A public school system in Charlotte, NC region providing rigorous academic instruction, support, and diverse programs to prepare students for success |
15,780 | |||
| 78 |
University of Central Floridaucf.edu
Public university offering over 230 degree programs across multiple campuses and online, fostering community and industry engagement. |
15,722 | |||
| 79 |
Virginia Techvt.edu
Comprehensive university offering diverse degree programs, leading research initiatives, and driving technological innovation and economic growth regionally. |
15,504 | |||
| 80 |
McGill Universitymcgill.ca
Leading research-intensive university with diverse international students, multiple campuses, extensive programs, and partnerships with teaching hospitals for healthcare education. |
15,235 | |||
| 81 |
University of Missouri-Columbiamissouri.edu
State-supported research university providing education, advancing arts, sciences, and professions, focusing on public service and economic development. |
14,879 | |||
| 82 |
University of Calgaryucalgary.ca
A leading Canadian university in Calgary focused on becoming one of the top five research universities, emphasizing research, teaching, and community engagement |
14,818 | |||
| 83 |
Michigan Medicineuofmhealth.org
A premier academic medical center with state-of-the-art facilities, focused on scientific discovery, education, compassionate care, health care reform, and biomedical innovation |
14,798 | |||
| 84 | 14,695 | ||||
| 85 |
Broward County Public Schoolsbrowardschools.com
One of the largest fully accredited K-12 and adult school districts in the US with over 260,000 students across 229 schools |
14,631 | |||
| 86 |
University of Iowajobs.uiowa.edu
Top public research university in Iowa with diverse community and advanced technology, offering cultural, educational, and recreational activities on a scenic campus |
14,628 | |||
| 87 |
CBC/Radio-Canadacbc.radio-canada.ca
Canadian public broadcaster promoting Canadian culture through diverse programming in multiple languages, supporting creative work and job opportunities in television production |
14,336 | |||
| 88 |
Oregon State Universityoregonstate.edu
Public university offering diverse academic programs, conducting research, and fostering community engagement with a strong identity as Beaver Nation. |
14,096 | |||
| 89 |
University of Connecticutuconn.edu
A renowned public university with 32,000 students, offering a variety of undergraduate, graduate, and professional degree programs across multiple schools and colleges |
14,027 | |||
| 90 |
NYC Health + Hospitalsnychealthandhospitals.org
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. |
13,705 | |||
| 91 |
Caja Costarricense de Seguro Social (CCSS)ccss.sa.cr
A Costa Rican organization that provides comprehensive healthcare services and social protection to the population, as mandated by current legislation |
13,662 | |||
| 92 |
Los Alamos National Laboratorylanl.gov
Multidisciplinary research institution focused on national security, nuclear stockpile safety, and advanced science in space, energy, computing, medicine, and nanotechnology. |
13,603 | |||
| 93 |
Oklahoma State Universitygo.okstate.edu
Delivering education, research, and community engagement in alignment with a land-grant mission for over a century |
13,451 | |||
| 94 |
University of South Carolinasc.edu
A globally recognized research university offering 324 degree programs, top-tier research, community engagement, and numerous nationally ranked programs in South Carolina |
13,337 | |||
| 95 |
University of Nebraska Systemnebraska.edu
Public university system with four campuses offering undergraduate, metropolitan, medical, and flagship land-grant education and research in Nebraska. |
13,314 | |||
| 96 |
Jefferson County Public Schoolsjefferson.kyschools.us
An educational institution serving over 96,000 students with a focus on personalized learning, diversity, excellence, and collaboration to empower students for success |
13,233 | |||
| 97 |
The University of Alabamaua.edu
Public university focused on teaching, research, and service, providing a creative environment for students and scholars to excel. |
13,215 | |||
| 98 |
McMaster Universitymcmaster.ca
Leading Canadian university known for innovation in education and research, serving 30,000 students and a global alumni network. |
13,160 | |||
| 99 |
University of North Texasunt.edu
A leading public research university with a focus on creativity, innovation, entrepreneurship, offering a wide range of academic programs and degrees |
12,980 | |||
| 100 |
Air National Guardairforce.com
Provides part-time military service with high-tech career training, college tuition assistance, and federal benefits while serving in local units near home. |
12,937 | |||
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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 119,525
- Multinational companies in North America 18,655
- Manufacturers in North America 10,136
- Education providers in North America 8,464
- Retail chains in North America 8,233
- Financial services firms in North America 7,767
- Companies with in-house R&D in North America 7,617
- Critical infrastructure operators in North America 6,768
- Hardware manufacturers in North America 5,983
- Financial Services companies in North America 5,618
- Higher Education companies in North America 3,953
- Construction companies in North America 3,792
- Energy companies in North America 3,542
- Publicly traded companies in North America 3,538
- Family-owned companies in North America 3,387
- Corporate groups and holding companies in North America 3,311
- Distributors and wholesalers in North America 3,208
- Hotel and hospitality groups in North America 3,149
- E-commerce companies in North America 2,944
- Logistics companies in North America 2,701
- Insurance companies in North America 2,622
- Government Administration companies in North America 2,495
- Retail companies in North America 2,407
- Contract manufacturers in North America 2,377