Businesses in Washington County, Illinois

As of October 20, 2026, ListRiver's records show 781 active registered businesses in Washington County, Illinois. 54% are LLCs. 9 were formed in September 2026.

From official Illinois registry records, updated weekly. Look up a Illinois business by name.

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Businesses on record

781

Formed in the last 12 months

Formed in September

With a phone number

13%

102 records

New Washington County businesses per month

Businesses on record by formation month, through September 2026. Monthly Illinois new-business reports · Get the list of 9 new businesses formed in September 2026

Entity types

LLCs424 · 54%
Corporations286 · 37%
Nonprofits71 · 9%

Top cities

Nashville420 · 54%
Okawville113 · 14%
Ashley59 · 8%
Hoyleton44 · 6%
Addieville38 · 5%
Richview33 · 4%
Oakdale27 · 3%
Du Bois15 · 2%
Irvington13 · 2%
Venedy9 · 1%
Radom5 · 1%
New Minden3 · 0%
Mascoutah1 · 0%
Pittsfield1 · 0%

Top ZIP codes

ZIP 62263424 · 54%
ZIP 62271113 · 14%
ZIP 6280859 · 8%
ZIP 6221447 · 6%
ZIP 6280345 · 6%
ZIP 6287733 · 4%
ZIP 6226827 · 3%
ZIP 6283115 · 2%
ZIP 6284813 · 2%
ZIP 628765 · 1%

Newest business names registered in Washington County

Get all 781 Washington County businesses · see price Just the 27 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	Hoyleton	LLC	Oct 2026
Name hidden	Nashville	LLC	Oct 2026
Name hidden	Hoyleton	LLC	Oct 2026
Name hidden	Okawville	LLC	Oct 2026
Name hidden	Ashley	LLC	Oct 2026
Name hidden	Nashville	LLC	Oct 2026
Name hidden	Nashville	LLC	Oct 2026
Name hidden	Ashley	LLC	Oct 2026
Name hidden	Okawville	LLC	Sep 2026
Name hidden	Addieville	LLC	Sep 2026
Name hidden	Nashville	LLC	Sep 2026
Name hidden	Du Bois	LLC	Sep 2026
Name hidden	Richview	LLC	Sep 2026
Name hidden	Du Bois	LLC	Sep 2026
Name hidden	Okawville	LLC	Sep 2026
Name hidden	Radom	LLC	Sep 2026
Name hidden	Nashville	Nonprofit	Sep 2026
Name hidden	Addieville	LLC	Aug 2026
Name hidden	Nashville	LLC	Aug 2026
Name hidden	Ashley	LLC	Aug 2026
Name hidden	Venedy	LLC	Aug 2026
Name hidden	Nashville	LLC	Aug 2026
Name hidden	Addieville	LLC	Aug 2026
Name hidden	Addieville	LLC	Aug 2026
Name hidden	Oakdale	LLC	Aug 2026

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Common questions about Washington County businesses

How many businesses are registered in Washington County, Illinois?

ListRiver has 781 active registered businesses in Washington County, Illinois on record as of October 20, 2026, from official Illinois business registry data. Dissolved and defunct businesses are not counted.

How many new businesses were formed in Washington County, Illinois in September 2026?

9 businesses on record in Washington County, Illinois were formed in September 2026.

How many new businesses opened in Washington County, Illinois in the last 12 months?

83 businesses on record in Washington County, Illinois were formed in the 12 months through September 2026.

What is the most common type of business in Washington County, Illinois?

LLCs are the most common: 424 of 781 businesses on record (54%), followed by Corporations with 286 (37%).

Where does this data come from?

From Illinois'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 Washington County, Illinois?

Use ListRiver's list builder to filter Washington County, Illinois 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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<div style="max-width:520px"><iframe src="https://listriver.com/embed/new-businesses/illinois/washington-county" title="New businesses in Washington County, Illinois 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/illinois/washington-county">Businesses in Washington County, Illinois</a>, ListRiver</p></div>

About this data

Counts come from official Illinois business registry records on file with ListRiver, current as of October 20, 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.