| # | Company | Employees |
|---|---|---|
| 1 |
State of Connecticutjobapscloud.com
Providing diverse employment opportunities across Connecticut in public service, promoting community safety, growth, and work-life balance. |
6,414 |
| 2 |
DoW Civilian Careersdodciviliancareers.com
An organization empowering individuals to find their purpose and explore careers related to the Department of Defense #DoDForward |
3,979 |
| 3 |
CT Department of Energy and Environmental Protectionportal.ct.gov
The organization is focused on conserving and protecting natural resources, improving air and water quality, and promoting clean, reliable energy in Connecticut |
3,344 |
| 4 |
Connecticut Department of Transportationct.gov
They aim to provide a safe and efficient transportation network to enhance quality of life and economic growth in Connecticut |
1,248 |
| 5 |
City of New Havennewhavenct.gov
Municipal government providing public services, community development, and administrative functions for residents and businesses in New Haven, Connecticut. |
1,177 |
| 6 |
Connecticut Judicial Branchjud.ct.gov
The Connecticut Judicial Branch resolves legal matters fairly, timely, and openly to serve justice and the public's interests |
1,166 |
| 7 |
City of Hartfordhartfordct.gov
Capital city in Connecticut, major insurance industry hub, historic landmarks, cultural institutions, and ongoing urban development projects downtown. |
1,007 |
| 8 |
City of Waterbury-Mayor's Officewaterburyct.org
Explore Waterbury's vibrant community and talented individuals Discover organizations and initiatives that make the city unique and welcoming |
907 |
| 9 |
Connecticut Department of Public Healthct.gov
The Connecticut Department of Public Health works to protect and improve the health and safety of the people by preventing disease and promoting health equity |
500 |
| 10 |
Connecticut State Department of Children & Familiesportal.ct.gov
Enacted in 1993, this organization in Connecticut offers community-based programs and services that prioritize the well-being of children and families |
454 |
| 11 |
The Town of Greenwich, CTgreenwichct.gov
A premier residential community on Long Island Sound, offering 8,000 acres of protected land, top schools, cultural events, and thriving industries |
435 |
| 12 |
Town of Newington, CTnewingtonct.gov
Historical Town Hall in Newington CT shares the town's evolution from Pipestave Swamp to West Farms, reflecting colonial trade and farming roots |
395 |
| 13 |
Connecticut Department of Laborportal.ct.gov
This company is dedicated to safeguarding Connecticut workers' interests, helping them and employers stay competitive, and providing high-quality services |
326 |
| 14 |
City of New Britainnewbritainct.gov
The company highlights New Britain's diverse population, rich history, top-notch park system, cultural attractions, recreational activities, and vibrant business community |
317 |
| 15 |
City of Bridgeport, Connecticutbridgeportct.gov
Managing diverse multicultural municipality located on Long Island Sound, providing public green spaces, maintaining waterfront landscapes, and fostering urban community growth. |
301 |
| 16 |
Connecticut State Department of Educationportal.ct.gov
Government agency overseeing education in Connecticut, ensuring equal opportunities and excellence in education for all students through funding distribution and technical education programs |
273 |
| 17 |
Town of Hamdenhamden.com
They oversee operations and services for a specific city or town, including regulations, public projects, and community programs |
238 |
| 18 |
CT Department of Revenue Servicesct.gov
The Department of Revenue Services aims to ensure fair tax collection, foster taxpayer compliance, improve agency performance, and support the state's fiscal health |
229 |
| 19 |
Connecticut Department of Social Servicesportal.ct.gov
Connecticut's Department of Social Services provides a wide range of health and human services to support residents in all 169 cities and towns |
225 |
| 20 |
City of Middletown, CTmiddletownct.gov
The company promotes Middletown, offering its diverse settings, historic downtown, parks, and convenient transportation options to attract businesses, employees, and residents |
208 |
| 21 |
State of Connecticut - DAS - Jobsjobapscloud.com
The State of Connecticut Executive Branch offers diverse career opportunities with a focus on serving the public and promoting work/life balance |
180 |
| 22 |
Town Of Wallingfordwallingfordct.gov
The company is based in Wallingford, Connecticut, a New England town with over 44,900 residents, strategically located between major cities |
172 |
| 23 |
Connecticut Department of Administrative Servicesportal.ct.gov
The company provides various business functions for state government, focusing on quality services, innovation, and rewarding careers for public servants |
163 |
| 24 |
Town Of Dariendarienct.gov
Town services provider for the community of Darien, CT, offering essential services and support to residents and local businesses |
158 |
| 25 |
Town Of Wethersfieldwethersfieldct.gov
Management of town operations, including services such as assessment, building inspection, data management, elections, finance, public safety, education, and community resources |
155 |
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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.
More company lists in Connecticut
- The largest companies in Connecticut 1,107
- Financial services firms in Connecticut 132
- Financial Services companies in Connecticut 77
- Hospitals and Health Care companies in Connecticut 76
- Critical infrastructure operators in Connecticut 61
- Investment Management companies in Connecticut 60
- Venture capital and private equity firms in Connecticut 59
- Manufacturers in Connecticut 49
- Retail chains in Connecticut 48
- Healthcare providers in Connecticut 48
- Education providers in Connecticut 44
- Higher Education companies in Connecticut 43
- IT Services and IT Consulting companies in Connecticut 43
- Insurance companies in Connecticut 41
- Aerospace and defence companies in Connecticut 39
- SaaS companies in Connecticut 38
- Primary and Secondary Education companies in Connecticut 34
- Publicly traded companies in Connecticut 34
- Contract manufacturers in Connecticut 33
- Energy companies in Connecticut 29
- Manufacturing companies in Connecticut 28
- Aviation and Aerospace Component Manufacturing companies in Connecticut 27
- Software Development companies in Connecticut 27
- Venture Capital and Private Equity Principals companies in Connecticut 27
The same list elsewhere in United States
- Government Administration companies in the United States 2,059
- Government Administration companies in California 279
- Government Administration companies in Florida 113
- Government Administration companies in Texas 113
- Government Administration companies in New York State 93
- Government Administration companies in Virginia 69
- Government Administration companies in North Carolina 68
- Government Administration companies in Maryland 62
- Government Administration companies in Alabama 61
- Government Administration companies in Illinois 61
- Government Administration companies in Massachusetts 61
- Government Administration companies in Washington State 60
- Government Administration companies in Ohio 54
- Government Administration companies in Minnesota 51
- Government Administration companies in Michigan 50
- Government Administration companies in Colorado 49
- Government Administration companies in Arizona 48
- Government Administration companies in Georgia 48
- Government Administration companies in Pennsylvania 48
- Government Administration companies in New Jersey 40
- Government Administration companies in Oregon 40
- Government Administration companies in Wisconsin 40
- Government Administration companies in Washington 99
- Government Administration companies in Sacramento 42