Businesses in Killingworth, Connecticut

As of October 12, 2026, ListRiver's records show 656 active registered businesses in Killingworth, Connecticut. 86% are LLCs. 7 were formed in September 2026.

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

Businesses on record

656

Formed in the last 12 months

Formed in September

With a phone number

51 records

New Killingworth businesses per month

Businesses on record by formation month, through September 2026. Monthly Connecticut new-business reports · Get the list of 7 new businesses formed in September 2026

Entity types

LLCs564 · 86%
Corporations48 · 7%
Nonprofits39 · 6%
LLPs2 · 0%
Other2 · 0%
Limited partnerships1 · 0%

Top ZIP codes

ZIP 06419654 · 100%
ZIP 065191 · 0%
ZIP 064431 · 0%

Industries (where known)

Professional & Technical Services97 · 15%
Construction92 · 14%
Real Estate80 · 13%
Other Services68 · 11%
Retail Trade38 · 6%
Agriculture, Forestry, Fishing36 · 6%
Administrative & Support Services35 · 6%
Health Care & Social Assistance31 · 5%
Accommodation & Food Services27 · 4%
Educational Services21 · 3%

Newest business names registered in Killingworth

Get all 656 Killingworth businesses · see price Just the 21 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	Killingworth	LLC	Oct 2026
Name hidden	Killingworth	LLC	Oct 2026
Name hidden	Killingworth	LLC	Oct 2026
Name hidden	Killingworth	LLC	Oct 2026
Name hidden	Killingworth	LLC	Sep 2026
Name hidden	Killingworth	LLC	Sep 2026
Name hidden	Killingworth	LLC	Sep 2026
Name hidden	Killingworth	LLC	Sep 2026
Name hidden	Killingworth	LLC	Sep 2026
Name hidden	Killingworth	LLC	Sep 2026
Name hidden	Killingworth	LLC	Sep 2026
Name hidden	Killingworth	LLC	Aug 2026
Name hidden	Killingworth	LLC	Aug 2026
Name hidden	Killingworth	LLC	Aug 2026
Name hidden	Killingworth	LLC	Aug 2026
Name hidden	Killingworth	LLC	Aug 2026
Name hidden	Killingworth	LLC	Aug 2026
Name hidden	Killingworth	LLC	Aug 2026
Name hidden	Killingworth	LLC	Aug 2026
Name hidden	Killingworth	LLC	Aug 2026
Name hidden	Killingworth	LLC	Aug 2026
Name hidden	Killingworth	LLC	Jul 2026
Name hidden	Killingworth	LLC	Jul 2026
Name hidden	Killingworth	LLC	Jul 2026
Name hidden	Killingworth	LLC	Jul 2026

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Common questions about Killingworth businesses

How many businesses are registered in Killingworth, Connecticut?

ListRiver has 656 active registered businesses in Killingworth, Connecticut on record as of October 12, 2026, from official Connecticut business registry data. Dissolved and defunct businesses are not counted.

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

7 businesses on record in Killingworth, Connecticut were formed in September 2026.

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

81 businesses on record in Killingworth, Connecticut were formed in the 12 months through September 2026.

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

LLCs are the most common: 564 of 656 businesses on record (86%), followed by Corporations with 48 (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 Killingworth, Connecticut?

Use ListRiver's list builder to filter Killingworth, 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/killingworth" title="New businesses in Killingworth, 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/killingworth">Businesses in Killingworth, Connecticut</a>, ListRiver</p></div>

About this data

Counts come from official Connecticut 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.