Businesses in Stamford, Connecticut

As of October 16, 2026, ListRiver's records show 22,958 active registered businesses in Stamford, Connecticut, more than any other city in Connecticut. 79% are LLCs. 221 were formed in September 2026. That is 6% of all Connecticut businesses on record.

From official Connecticut registry records, updated weekly. Most Stamford businesses are in Western Connecticut Planning Region. Look up a Connecticut business by name.

Businesses on record
22,958
Formed in the last 12 months
2,692
Formed in September
221
With a phone number
6%
1,430 records

New Stamford businesses per month

0150300Oct 2024: 181Oct 24Nov 2024: 145Dec 2024: 146Jan 2025: 2222025Feb 2025: 206Mar 2025: 194Apr 2025: 217May 2025: 195Jun 2025: 184Jul 2025: 226Aug 2025: 168Sep 2025: 194Oct 2025: 183Nov 2025: 203Dec 2025: 146Jan 2026: 2902026Feb 2026: 231Mar 2026: 251Apr 2026: 258May 2026: 254Jun 2026: 226Jul 2026: 184Aug 2026: 245Sep 2026: 221

Businesses on record by formation month, through September 2026. Monthly Connecticut new-business reports · Get the list of 221 new businesses formed in September 2026

Entity types

  • LLCs18,127 · 79%
  • Corporations2,994 · 13%
  • Nonprofits1,252 · 5%
  • Limited partnerships347 · 2%
  • Other186 · 1%
  • LLPs52 · 0%

Top ZIP codes

Industries (where known)

  • Real Estate4,269 · 22%
  • Professional & Technical Services2,561 · 13%
  • Construction2,321 · 12%
  • Other Services2,043 · 11%
  • Finance & Insurance1,229 · 6%
  • Retail Trade1,103 · 6%
  • Administrative & Support Services1,079 · 6%
  • Health Care & Social Assistance975 · 5%
  • Accommodation & Food Services630 · 3%
  • Arts, Entertainment & Recreation564 · 3%

Newest business names registered in Stamford

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Common questions about Stamford businesses

How many businesses are registered in Stamford, Connecticut?

ListRiver has 22,958 active registered businesses in Stamford, Connecticut on record as of October 16, 2026, from official Connecticut business registry data. Dissolved and defunct businesses are not counted.

How many new businesses were formed in Stamford, Connecticut in September 2026?

221 businesses on record in Stamford, Connecticut were formed in September 2026.

How many new businesses opened in Stamford, Connecticut in the last 12 months?

2,692 businesses on record in Stamford, Connecticut were formed in the 12 months through September 2026.

What is the most common type of business in Stamford, Connecticut?

LLCs are the most common: 18,127 of 22,958 businesses on record (79%), followed by Corporations with 2,994 (13%).

Where does this data come from?

From Connecticut's official business registry. ListRiver loads each new state file, standardizes it, removes duplicates and updates its database weekly. Email and industry details are added from SMBCredit.net where available.

How do I get a list of businesses in Stamford, Connecticut?

Use ListRiver's list builder to filter Stamford, Connecticut businesses by entity type, formation date, industry and contact details, see the exact count and price, and download a CSV. Every list includes monthly refresh files.

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About this data

Counts come from official Connecticut business registry records on file with ListRiver, current as of October 16, 2026. They include businesses that are active on the state register; dissolved and defunct entities are excluded. Contact details are added from SMBCredit.net where available. Formation months reflect the registration date the state reports. See the methodology for sources, update schedules and known limits.