Businesses in Harwinton, Connecticut

As of October 11, 2026, ListRiver's records show 545 active registered businesses in Harwinton, Connecticut. 87% are LLCs. 5 were formed in September 2026.

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

Businesses on record

545

Formed in the last 12 months

Formed in September

With a phone number

50 records

New Harwinton businesses per month

Businesses on record by formation month, through September 2026. Monthly Connecticut new-business reports · Get the list of 5 new businesses formed in September 2026

Entity types

LLCs474 · 87%
Nonprofits36 · 7%
Corporations33 · 6%
Other1 · 0%
Limited partnerships1 · 0%

Industries (where known)

Real Estate114 · 21%
Construction101 · 19%
Other Services52 · 10%
Professional & Technical Services47 · 9%
Agriculture, Forestry, Fishing35 · 7%
Retail Trade31 · 6%
Administrative & Support Services27 · 5%
Health Care & Social Assistance23 · 4%
Arts, Entertainment & Recreation22 · 4%
Manufacturing22 · 4%

Newest business names registered in Harwinton

Get all 545 Harwinton businesses · see price Just the 9 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	Harwinton	LLC	Sep 2026
Name hidden	Harwinton	LLC	Sep 2026
Name hidden	Harwinton	LLC	Sep 2026
Name hidden	Harwinton	LLC	Sep 2026
Name hidden	Harwinton	LLC	Sep 2026
Name hidden	Harwinton	LLC	Aug 2026
Name hidden	Harwinton	LLC	Aug 2026
Name hidden	Harwinton	LLC	Aug 2026
Name hidden	Harwinton	LLC	Aug 2026
Name hidden	Harwinton	LLC	Jul 2026
Name hidden	Harwinton	LLC	Jul 2026
Name hidden	Harwinton	LLC	Jul 2026
Name hidden	Harwinton	LLC	Jul 2026
Name hidden	Harwinton	Corporation	Jun 2026
Name hidden	Harwinton	LLC	Jun 2026
Name hidden	Harwinton	LLC	Jun 2026
Name hidden	Harwinton	LLC	Jun 2026
Name hidden	Harwinton	LLC	Jun 2026
Name hidden	Harwinton	LLC	Jun 2026
Name hidden	Harwinton	LLC	Jun 2026
Name hidden	Harwinton	Nonprofit	Jun 2026
Name hidden	Harwinton	LLC	May 2026
Name hidden	Harwinton	LLC	May 2026
Name hidden	Harwinton	LLC	May 2026
Name hidden	Harwinton	LLC	May 2026

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Common questions about Harwinton businesses

How many businesses are registered in Harwinton, Connecticut?

ListRiver has 545 active registered businesses in Harwinton, 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 Harwinton, Connecticut in September 2026?

5 businesses on record in Harwinton, Connecticut were formed in September 2026.

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

72 businesses on record in Harwinton, Connecticut were formed in the 12 months through September 2026.

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

LLCs are the most common: 474 of 545 businesses on record (87%), followed by Nonprofits with 36 (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 Harwinton, Connecticut?

Use ListRiver's list builder to filter Harwinton, 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

Western Connecticut Planning Region Capitol Planning Region South Central Connecticut Planning Region Naugatuck Valley Planning Region Greater Bridgeport Planning Region Southeastern Connecticut Planning Region Lower Connecticut River Valley Planning Region Northwest Hills Planning Region Northeastern Connecticut Planning Region Stamford Bridgeport Greenwich Hartford Norwalk New Haven Danbury Glastonbury Waterbury Fairfield West Hartford Westport Milford Hamden Shelton Stratford New Britain Meriden Wallingford Manchester Willimantic Thomaston Putnam Essex Durham Unionville South Glastonbury Terryville Killingworth Pawcatuck Granby East Windsor Northford Danielson New Hartford Uncasville Lebanon Oakville East Granby Woodstock Weatogue Plainfield Marlborough Beacon Falls Higganum Sherman Bethlehem North Stonington Deep River East Haddam Hebron Sharon Ledyard Bolton Chester Broad Brook Middlefield Brooklyn Dayville Oakdale

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<div style="max-width:520px"><iframe src="https://listriver.com/embed/new-businesses/connecticut/harwinton" title="New businesses in Harwinton, 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/harwinton">Businesses in Harwinton, 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.