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969,137 companies in Connecticut.
Discover 969,137 companies headquartered in Connecticut, spanning manufacturing, construction, and industrial sectors. Browse by city — including Stamford, Hartford, New Haven or by industry, and open any profile for its location, website, size, and NAICS/SIC classification.
Connecticut companies by size and revenue
| Employees | Companies | Share |
|---|---|---|
| 1-50 | 948,692 | 98.7% |
| 51-200 | 9,651 | 1.0% |
| 201-1000 | 2,505 | 0.3% |
| 1001-5000 | 339 | 0.0% |
| 5001+ | 178 | 0.0% |
| Revenue | Companies | Share |
|---|---|---|
| Under $10M | 936,842 | 98.8% |
| $10M-$50M | 8,893 | 0.9% |
| $50M-$250M | 1,903 | 0.2% |
| $250M-$1B | 293 | 0.0% |
| $1B+ | 332 | 0.0% |
Share is of companies with a known value — 961,365 with headcount and 948,263 with revenue on file, as of Jul 17, 2026.
Frequently asked questions
How many companies are based in Connecticut?
969,137 companies in the directory are headquartered in Connecticut, browsable by city or by industry.
How many large companies are in Connecticut?
1,096 of the 969,137 companies in Connecticut employ more than 500 people, and 332 report over $1 billion in annual revenue. See the size and revenue breakdown above for the full distribution.
What size are most Connecticut companies?
Most are small and mid-sized businesses: the size and revenue tables above show the full spread, from under $10M up to $1B+, across the 948,263 companies with revenue on file.
What information is included for each company?
Every listing includes the company name, location, website, employee size, revenue range where available, and NAICS/SIC classification, with a link to the full profile.
Where does this directory come from?
Listings are compiled and maintained by Factur, a sales and marketing firm for B2B manufacturers. Any company can request an update or removal from its profile page.