The 36 largest companies in Ithaca (2026 list)

#	Company	Industry	Headquarters	Employees	Founded
1	Cornell University cornell.edu Privately endowed research university partnering with New York State, focusing on public engagement to improve quality of life globally.	Higher Education	🇺🇸 Ithaca	19,921	1865
2	Ithaca College ithaca.edu A leading liberal arts college offering diverse majors, personal mentorship, and opportunities for personal growth and impactful change in the community and worldwide	Higher Education	🇺🇸 Ithaca	2,921	1892
3	Cayuga Health System cayugahealth.org A health system formed by uniting Cayuga Medical Center and Schuyler Hospital, providing comprehensive, community-centered care across the Finger Lakes and central New York	Hospitals and Health Care	🇺🇸 Ithaca	1,456	n/a
4	Tompkins Financial Corporation tompkinsfinancial.com A NY-based financial services holding company offering community banking, insurance, and wealth management services, focused on responsible growth and strong returns for clients and shareholders	Financial Services	🇺🇸 Ithaca	1,074	1836
5	Cayuga Medical Center at Ithaca cayugamed.org A regional medical center in Ithaca, NY, providing high-quality healthcare and affiliated with prestigious organizations for comprehensive medical services and treatment	Hospitals and Health Care	🇺🇸 Ithaca	906	n/a
6	Tompkins Community Bank tompkinsbank.com Community-based financial institution providing innovative financial solutions for local families and businesses since 1836, combining local ties with broad financial capabilities	Banking	🇺🇸 Ithaca	675	1836
7	Ithaca City School District ithacacityschools.org The company serves a community of over 6000 thinkers by engaging, educating, and empowering them #ICSDProud	Primary and Secondary Education	🇺🇸 Ithaca	586	n/a
8	Cornell University College of Veterinary Medicine vet.cornell.edu A leading veterinary college educating students, conducting research, providing clinical care, and contributing to public health and wildlife protection efforts	Higher Education	🇺🇸 Ithaca	584	1894
9	Cornell Cooperative Extension cals.cornell.edu An individual & family services company located in Albany, New York, providing outreach and education programs through Cornell Cooperative Extension	Individual and Family Services	🇺🇸 Ithaca	511	1914
10	The Outreach Team theoutreachteam.net A national consulting firm leading progressive campaigns and civic engagement efforts to create a fairer, cleaner, safer, and more peaceful world	Non-profit Organizations	🇺🇸 Ithaca	468	2017
11	Racker racker.org The organization supports individuals with disabilities and their families by providing opportunities for learning, connection, and independence within a welcoming community	Individual and Family Services	🇺🇸 Ithaca	446	1948
12	Cornell University College of Agriculture and Life Sciences cals.cornell.edu A leading institution in agriculture and life sciences, conducting world-renowned research, education, and outreach to address global challenges and improve communities	Higher Education	🇺🇸 Ithaca	428	1896
13	TOMPKINS COUNTY tompkinscountyny.gov Government entity in Tompkins County, NY with 27 departments providing human services, public health, safety, roads maintenance, public records, elections, and more	Government Administration	🇺🇸 Ithaca	421	1817
14	Cornell Lab of Ornithology birds.cornell.edu This nonprofit organization conducts environmental research, conservation efforts, and education programs focused on birds and wildlife to protect the planet	Non-profit Organizations	🇺🇸 Ithaca	410	1915
15	Cornell Johnson Graduate School of Management johnson.cornell.edu Graduate business school at Cornell University offering transformative MBA programs with access to diverse educational and research opportunities	Higher Education	🇺🇸 Ithaca	373	1946
16	Cornell Law School lawschool.cornell.edu The company is a prestigious law school focused on producing well-trained, morally-based lawyers through high-quality faculty and an intellectually rich community	Higher Education	🇺🇸 Ithaca	372	n/a
17	Cornell Duffield College of Engineering duffield.cornell.edu Leading engineering program focused on educating students, conducting groundbreaking research, and fostering technological innovations to address global challenges	Education Administration Programs	🇺🇸 Ithaca	360	1870
18	eCornell ecornell.cornell.edu A professional education unit of Cornell University, offering online programs and executive development to individuals and organizations worldwide	E-Learning Providers	🇺🇸 Ithaca	360	2000
19	CBORD illumiatech.com A global leader in integrated technology solutions for education, healthcare, senior living, and business campuses, improving operational efficiency and customer satisfaction	Software Development	🇺🇸 Ithaca	351	1975
20	Beginnings Credit Union beginnings.com A non-profit credit union serving multiple counties, focused on providing personalized financial services, promoting financial literacy, and supporting local communities	Financial Services	🇺🇸 Ithaca	349	1953
21	Cornell University ILR School ilr.cornell.edu This educational institution focuses on improving the lives of workers and transforming the future of work through teaching, research, and outreach initiatives	Higher Education	🇺🇸 Ithaca	328	1945
22	The Statler Hotel statlerhotel.cornell.edu A premier collegiate lifestyle hotel affiliated with Cornell University, providing personalized experiences and fostering future hospitality leaders through collaboration and excellence	Hospitality	🇺🇸 Ithaca	268	1989
23	PSD psdconsulting.com An energy efficiency services and technology company combining building science with technology to achieve tangible energy savings in buildings	Business Consulting and Services	🇺🇸 Ithaca	259	1998
24	Cornell University - College of Human Ecology human.cornell.edu A prestigious institution with a rich history in academic excellence, offering innovative research facilities, unique programs, and an array of opportunities for students	Higher Education	🇺🇸 Ithaca	219	n/a
25	Cornell University - College of Arts and Sciences as.cornell.edu The company focuses on providing a liberal arts education for the 21st century, promoting interdisciplinary collaboration, innovation, and civic leadership	Higher Education	🇺🇸 Ithaca	202	1865
26	Ithaca College Television ictv.org Student-run TV station in Ithaca, NY, founded in 1958 Airing original programming to 26,000 households in Tompkins County via cable and online	Broadcast Media Production and Distribution	🇺🇸 Ithaca	186	1958
27	Boyce Thompson Institute btiscience.org A life sciences research institution in Ithaca, NY, conducting plant and life sciences research to enhance food security, agricultural sustainability, and human health	Research Services	🇺🇸 Ithaca	157	1924
28	Cornell Dyson School of Applied Economics & Management dyson.cornell.edu A top-ranked business school offering undergraduate and graduate programs focused on developing students' business and economic skills to make a positive impact on the world	Higher Education	🇺🇸 Ithaca	154	1911
29	Cornell University: Cornell Jeb E. Brooks School of Public Policy publicpolicy.cornell.edu A new school of public policy at Cornell University offering undergraduate, graduate, doctoral, and professional courses focusing on global policy issues	Higher Education	🇺🇸 Ithaca	154	2021
30	Ongweoweh Corp ongweoweh.com A Native American-owned pallet management company providing procurement, recycling, and supply chain optimization services to Fortune 500 companies, with a focus on innovation and continuous improvement	Packaging and Containers Manufacturing	🇺🇸 Ithaca	136	1978
31	Ursa Space Systems ursaspace.com Provides business and government decision-makers with on-demand analytic solutions using radar satellite networks and data fusion expertise to detect real-time changes.	Information Services	🇺🇸 Ithaca	75	2014
32	Cornell Fashion Collective mercu-wgp.com A student-run organization at Cornell University that offers a platform for creative expression in fashion design and management through annual runway shows	Retail Apparel and Fashion	🇺🇸 Ithaca	62	n/a
33	Big Red Ventures brventurefund.com An early-stage venture capital fund run by MBA students at Cornell University, investing in US high-growth companies and providing access to new innovations	Venture Capital and Private Equity Principals	🇺🇸 Ithaca	48	2001
34	Rosie by Instacart rosieapp.com Leading online grocery shopping platform connecting customers with retailers through strategic partnerships for smart, easy, and convenient shopping	Technology, Information and Internet	🇺🇸 Ithaca	37	2012
35	Gimme! Coffee gimmecoffee.com Specialty coffee roaster and retailer with wholesale business, cafes in NY, and loyal following Worker-owned cooperative prioritizing sustainable and ethical practices	Food and Beverage Services	🇺🇸 Ithaca	36	2000
36	Ithaca Coffee Company ithacacoffee.com A small batch coffee roaster offering fresh, exotic coffees roasted to highlight unique qualities, along with a retail location specializing in gourmet food and gifts	Food and Beverage Services	🇺🇸 Ithaca	15	2004

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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 Oct 24, 2026.

The same list elsewhere in United States

The largest companies in the United States 91,669
The largest companies in California 12,813
The largest companies in New York State 10,485
The largest companies in Texas 8,086
The largest companies in Florida 4,945
The largest companies in Illinois 4,175
The largest companies in Pennsylvania 3,110
The largest companies in Massachusetts 3,093
The largest companies in Georgia 2,632
The largest companies in Ohio 2,618
The largest companies in New Jersey 2,569
The largest companies in Virginia 2,503
The largest companies in Michigan 2,346
The largest companies in North Carolina 2,174
The largest companies in Alabama 1,806
The largest companies in Washington State 1,785
The largest companies in Colorado 1,774
The largest companies in Minnesota 1,700
The largest companies in Maryland 1,527
The largest companies in Wisconsin 1,482
The largest companies in New York 6,920
The largest companies in San Francisco 2,030
The largest companies in Houston 1,791
The largest companies in Chicago 1,668