Connecticut Business by the Numbers: 2026 Company Breakdown

Key findings

• Connecticut ranks 21st nationally with 969,137 companies — 1.5% of all 64,799,929 U.S. companies in the directory.
• Stamford is the state’s largest business hub, with 55,731 companies — 5.8% of every company in Connecticut.
• Business is concentrated in a few metros: Stamford, Hartford and New Haven together hold 14.3% of the state’s companies.
• Industrial & mechanical leads the state’s industries at 273,990 companies (28.3%), across 9 tracked sectors.

How Connecticut ranks nationally

Connecticut and its closest neighbours by total company count. Select a state to open its own study.

Top Connecticut cities by number of companies

These 10 cities account for 33.6% of all companies in Connecticut. Select any city to browse its full company list.

Browse all Connecticut companies →

Connecticut companies by industry

Every company is classified by its primary industry using NAICS/SIC codes. Select a sector to see those Connecticut companies.

What the numbers show

Connecticut’s 969,137 companies place it 21st nationally, 1.5% of the U.S. total. Activity clusters in its largest metros — Stamford, Hartford and New Haven alone account for 14.3% of the state’s companies — while industrial & mechanical is the dominant sector at 28.3%. For buyers and sellers, that means the deepest pools of suppliers and manufacturers sit in a handful of cities and one or two sectors; the charts above link straight into each so you can shortlist by capability and region.

Methodology

Figures reflect companies listed in Factur’s U.S. business directory as of 2026, classified by headquarters city and primary industry using NAICS/SIC codes. “Companies” includes manufacturers, suppliers, and B2B businesses of all sizes; counts are directory totals, not official census figures, and percentages are computed against the Connecticut directory total. Data compiled by Factur, a sales and marketing firm for B2B manufacturers.