Businesses in Setauket, New York

As of October 12, 2026, ListRiver's records show 1,556 active registered businesses in Setauket, New York. 48% are LLCs. 4 were formed in September 2026.

From official New York registry records, updated weekly. Most Setauket businesses are in Suffolk County. Look up a New York business by name.

Businesses on record
1,556
Formed in the last 12 months
68
Formed in September
4
With a registered agent
13%
209 records

New Setauket businesses per month

0510Oct 2024: 2Oct 24Nov 2024: 8Dec 2024: 4Jan 2025: 62025Feb 2025: 3Mar 2025: 7Apr 2025: 8May 2025: 1Jun 2025: 8Jul 2025: 3Aug 2025: 5Sep 2025: 3Oct 2025: 7Nov 2025: 9Dec 2025: 7Jan 2026: 72026Feb 2026: 6Mar 2026: 8Apr 2026: 8May 2026: 3Jun 2026: 3Jul 2026: 3Aug 2026: 3Sep 2026: 4

Businesses on record by formation month, through September 2026. Monthly New York new-business reports · Get the list of 4 new businesses formed in September 2026

Entity types

  • LLCs748 · 48%
  • Corporations743 · 48%
  • Other51 · 3%
  • Limited partnerships7 · 0%
  • LLPs6 · 0%
  • Nonprofits1 · 0%

Top ZIP codes

Newest business names registered in Setauket

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BusinessCityTypeFormed
Name hiddenSetauketLLCOct 2026
Name hiddenSetauketLLCSep 2026
Name hiddenSetauketLLCSep 2026
Name hiddenSetauketLLCSep 2026
Name hiddenSetauketLLCSep 2026
Name hiddenSetauketLLCAug 2026
Name hiddenSetauketLLCAug 2026
Name hiddenSetauketLLCAug 2026
Name hiddenSetauketLLCJul 2026
Name hiddenSetauketCorporationJul 2026
Name hiddenSetauketLLCJul 2026
Name hiddenSetauketLLCJun 2026
Name hiddenSetauketLLCJun 2026
Name hiddenSetauketLLCJun 2026
Name hiddenSetauketCorporationMay 2026
Name hiddenSetauketLLCMay 2026
Name hiddenSetauketLLCMay 2026
Name hiddenSetauketLLCApr 2026
Name hiddenSetauketLLCApr 2026
Name hiddenSetauketCorporationApr 2026
Name hiddenSetauketLLCApr 2026
Name hiddenSetauketLLCApr 2026
Name hiddenSetauketLLCApr 2026
Name hiddenSetauketLLCApr 2026
Name hiddenSetauketLLCApr 2026

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Common questions about Setauket businesses

How many businesses are registered in Setauket, New York?

ListRiver has 1,556 active registered businesses in Setauket, New York on record as of October 12, 2026, from official New York business registry data. Dissolved and defunct businesses are not counted.

How many new businesses were formed in Setauket, New York in September 2026?

4 businesses on record in Setauket, New York were formed in September 2026.

How many new businesses opened in Setauket, New York in the last 12 months?

68 businesses on record in Setauket, New York were formed in the 12 months through September 2026.

What is the most common type of business in Setauket, New York?

LLCs are the most common: 748 of 1,556 businesses on record (48%), followed by Corporations with 743 (48%).

Where does this data come from?

From New York'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 Setauket, New York?

Use ListRiver's list builder to filter Setauket, New York 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 New York business registry records on file with ListRiver, current as of October 12, 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.