Businesses in Haddam, Connecticut

As of October 11, 2026, ListRiver's records show 331 active registered businesses in Haddam, Connecticut. 87% are LLCs. 3 were formed in September 2026.

From official Connecticut registry records, updated weekly. Most Haddam businesses are in Lower Connecticut River Valley Planning Region. Look up a Connecticut business by name.

Businesses on record

331

Formed in the last 12 months

Formed in September

With a phone number

26 records

New Haddam businesses per month

Businesses on record by formation month, through September 2026. Monthly Connecticut new-business reports · Get the list of 3 new businesses formed in September 2026

Entity types

LLCs288 · 87%
Nonprofits22 · 7%
Corporations20 · 6%
LLPs1 · 0%

Top ZIP codes

ZIP 06438316 · 95%
ZIP 0644113 · 4%
ZIP 064241 · 0%
ZIP 064731 · 0%

Industries (where known)

Real Estate74 · 23%
Construction47 · 14%
Other Services40 · 12%
Professional & Technical Services34 · 10%
Retail Trade24 · 7%
Accommodation & Food Services19 · 6%
Administrative & Support Services14 · 4%
Health Care & Social Assistance14 · 4%
Agriculture, Forestry, Fishing11 · 3%
Manufacturing10 · 3%

Newest business names registered in Haddam

Get all 331 Haddam businesses · see price Just the 4 formed in the last 90 days · see price

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This is a small sample, not the full list. To keep automated scrapers from copying our data, we only show a handful of records on public pages. Your downloaded list includes every matching business.

Business	City	Type	Formed
Name hidden	Haddam	LLC	Sep 2026
Name hidden	Haddam	LLC	Sep 2026
Name hidden	Haddam	LLC	Sep 2026
Name hidden	Haddam	LLC	Aug 2026
Name hidden	Haddam	LLC	Jul 2026
Name hidden	Haddam	LLC	Jul 2026
Name hidden	Haddam	LLC	Jul 2026
Name hidden	Haddam	LLC	Jun 2026
Name hidden	Haddam	LLC	Jun 2026
Name hidden	Haddam	LLC	Jun 2026
Name hidden	Haddam	LLC	Jun 2026
Name hidden	Haddam	LLC	Jun 2026
Name hidden	Haddam	LLC	Jun 2026
Name hidden	Haddam	LLC	May 2026
Name hidden	Haddam	LLC	May 2026
Name hidden	Haddam	LLC	Apr 2026
Name hidden	Haddam	LLC	Apr 2026
Name hidden	Haddam	LLC	Apr 2026
Name hidden	Haddam	LLC	Apr 2026
Name hidden	Haddam	LLC	Mar 2026
Name hidden	Haddam	LLC	Mar 2026
Name hidden	Haddam	LLC	Mar 2026
Name hidden	Haddam	LLC	Mar 2026
Name hidden	Haddam	LLC	Mar 2026
Name hidden	Haddam	LLC	Mar 2026

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Common questions about Haddam businesses

How many businesses are registered in Haddam, Connecticut?

ListRiver has 331 active registered businesses in Haddam, Connecticut on record as of October 11, 2026, from official Connecticut business registry data. Dissolved and defunct businesses are not counted.

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

3 businesses on record in Haddam, Connecticut were formed in September 2026.

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

43 businesses on record in Haddam, Connecticut were formed in the 12 months through September 2026.

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

LLCs are the most common: 288 of 331 businesses on record (87%), followed by Nonprofits with 22 (7%).

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 Haddam, Connecticut?

Use ListRiver's list builder to filter Haddam, 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.

More Connecticut business lists

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<div style="max-width:520px"><iframe src="https://listriver.com/embed/new-businesses/connecticut/haddam" title="New businesses in Haddam, Connecticut by month" width="100%" height="370" style="border:0" loading="lazy"></iframe><p style="font:13px sans-serif;margin:4px 0 0">Source: <a href="https://listriver.com/business-lists/connecticut/haddam">Businesses in Haddam, Connecticut</a>, ListRiver</p></div>

About this data

Counts come from official Connecticut business registry records on file with ListRiver, current as of October 11, 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.