Businesses in Plainfield, Connecticut

As of October 12, 2026, ListRiver's records show 523 active registered businesses in Plainfield, Connecticut. 86% are LLCs. 15 were formed in September 2026.

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

Businesses on record

523

Formed in the last 12 months

Formed in September

With a phone number

16%

82 records

New Plainfield businesses per month

Businesses on record by formation month, through September 2026. Monthly Connecticut new-business reports · Get the list of 15 new businesses formed in September 2026

Entity types

LLCs448 · 86%
Corporations43 · 8%
Nonprofits28 · 5%
LLPs3 · 1%
Other1 · 0%

Top ZIP codes

ZIP 06374513 · 98%
ZIP 063544 · 1%
ZIP 063511 · 0%
ZIP 062341 · 0%
ZIP 063871 · 0%
ZIP 062411 · 0%
ZIP 063721 · 0%
ZIP 062391 · 0%

Industries (where known)

Real Estate105 · 20%
Construction67 · 13%
Other Services58 · 11%
Retail Trade53 · 10%
Professional & Technical Services29 · 6%
Manufacturing29 · 6%
Accommodation & Food Services28 · 5%
Transportation & Warehousing25 · 5%
Health Care & Social Assistance23 · 4%
Administrative & Support Services23 · 4%

Newest business names registered in Plainfield

Get all 523 Plainfield businesses · see price Just the 20 formed in the last 90 days · see price

Opens the list builder with Plainfield already selected, so you see the exact count and price before you buy. Your list includes addresses, counties, registered agents and more.

See the business names

Enter your email and we'll send you a 6-digit code. Confirm it to see the newest businesses registered in Plainfield, and on every ListRiver business-list page for 30 days. Free, no account needed.

We may send you occasional emails about ListRiver business data; unsubscribe any time. Privacy · Members: sign in

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	Plainfield	LLC	Oct 2026
Name hidden	Plainfield	LLC	Sep 2026
Name hidden	Plainfield	LLC	Sep 2026
Name hidden	Plainfield	LLP	Sep 2026
Name hidden	Plainfield	LLC	Sep 2026
Name hidden	Plainfield	LLC	Sep 2026
Name hidden	Plainfield	LLC	Sep 2026
Name hidden	Plainfield	LLC	Sep 2026
Name hidden	Plainfield	LLC	Sep 2026
Name hidden	Plainfield	LLC	Sep 2026
Name hidden	Plainfield	LLC	Sep 2026
Name hidden	Plainfield	LLC	Sep 2026
Name hidden	Plainfield	LLC	Sep 2026
Name hidden	Plainfield	LLC	Sep 2026
Name hidden	Plainfield	LLC	Sep 2026
Name hidden	Plainfield	LLC	Sep 2026
Name hidden	Plainfield	LLC	Aug 2026
Name hidden	Plainfield	LLC	Aug 2026
Name hidden	Plainfield	LLC	Aug 2026
Name hidden	Plainfield	LLC	Aug 2026
Name hidden	Plainfield	LLC	Jul 2026
Name hidden	Plainfield	LLC	Jul 2026
Name hidden	Plainfield	LLC	Jul 2026
Name hidden	Plainfield	LLC	Jul 2026
Name hidden	Plainfield	LLC	Jul 2026

Build your Plainfield business list

See the exact count and price as you filter by county, city, ZIP, entity type and formation date. Download a CSV right away and get monthly refreshes. Verified businesses can pay 20% today and the rest over 6 months with Pay-in-6™, building business credit as they pay.

Build this list

Own a business in Plainfield?

Before a lender reads your application, its verification system checks your state filing, your exact legal name and your domain against each other. When they don't agree, you're declined and never told why.

Run the same checks free with our affiliated company, Peak Discounters. No account, no card, under a minute.

Run the free lender check

Common questions about Plainfield businesses

How many businesses are registered in Plainfield, Connecticut?

ListRiver has 523 active registered businesses in Plainfield, 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 Plainfield, Connecticut in September 2026?

15 businesses on record in Plainfield, Connecticut were formed in September 2026.

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

83 businesses on record in Plainfield, Connecticut were formed in the 12 months through September 2026.

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

LLCs are the most common: 448 of 523 businesses on record (86%), followed by Corporations with 43 (8%).

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 Plainfield, Connecticut?

Use ListRiver's list builder to filter Plainfield, 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 Putnam Essex Durham Unionville South Glastonbury Terryville Killingworth Pawcatuck Granby East Windsor Northford Danielson New Hartford Uncasville Lebanon Oakville East Granby Woodstock Harwinton Weatogue Marlborough Beacon Falls Higganum Sherman Bethlehem North Stonington Deep River East Haddam Hebron Sharon Ledyard Bolton Chester Broad Brook Middlefield Brooklyn Dayville Oakdale Columbia Lakeville

Put this chart on your website

Free to use on any site, and it updates itself every month. Copy this code and paste it into your page. Preview the chart.

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