Businesses in Mercer County, Illinois

As of October 20, 2026, ListRiver's records show 586 active registered businesses in Mercer County, Illinois. 66% are LLCs. 11 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

586

Formed in the last 12 months

Formed in September

With a phone number

13%

74 records

New Mercer County businesses per month

Businesses on record by formation month, through September 2026. Monthly Illinois new-business reports · Get the list of 11 new businesses formed in September 2026

Entity types

LLCs389 · 66%
Corporations108 · 18%
Nonprofits89 · 15%

Top cities

Aledo271 · 46%
Sherrard104 · 18%
Viola52 · 9%
New Windsor33 · 6%
New Boston29 · 5%
Joy27 · 5%
Seaton19 · 3%
Keithsburg17 · 3%
North Henderson13 · 2%
Matherville12 · 2%
Preemption9 · 2%

Top ZIP codes

ZIP 61231272 · 46%
ZIP 61281104 · 18%
ZIP 6148652 · 9%
ZIP 6146533 · 6%
ZIP 6127229 · 5%
ZIP 6126027 · 5%
ZIP 6147618 · 3%
ZIP 6144217 · 3%
ZIP 6146613 · 2%
ZIP 6126312 · 2%
ZIP 612769 · 2%

Newest business names registered in Mercer County

Get all 586 Mercer County businesses · see price Just the 22 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	Matherville	LLC	Oct 2026
Name hidden	Sherrard	LLC	Oct 2026
Name hidden	Sherrard	LLC	Oct 2026
Name hidden	Sherrard	LLC	Oct 2026
Name hidden	New Windsor	LLC	Oct 2026
Name hidden	Aledo	Nonprofit	Oct 2026
Name hidden	Aledo	LLC	Sep 2026
Name hidden	Sherrard	LLC	Sep 2026
Name hidden	Aledo	LLC	Sep 2026
Name hidden	Viola	LLC	Sep 2026
Name hidden	Aledo	LLC	Sep 2026
Name hidden	Aledo	LLC	Sep 2026
Name hidden	Aledo	LLC	Sep 2026
Name hidden	New Boston	LLC	Sep 2026
Name hidden	Aledo	LLC	Sep 2026
Name hidden	Aledo	LLC	Sep 2026
Name hidden	Aledo	Corporation	Sep 2026
Name hidden	Viola	LLC	Aug 2026
Name hidden	Joy	LLC	Aug 2026
Name hidden	Aledo	LLC	Aug 2026
Name hidden	Aledo	LLC	Aug 2026
Name hidden	Keithsburg	LLC	Aug 2026
Name hidden	Aledo	LLC	Jul 2026
Name hidden	New Windsor	LLC	Jul 2026
Name hidden	Aledo	LLC	Jul 2026

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Common questions about Mercer County businesses

How many businesses are registered in Mercer County, Illinois?

ListRiver has 586 active registered businesses in Mercer 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 Mercer County, Illinois in September 2026?

11 businesses on record in Mercer County, Illinois were formed in September 2026.

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

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

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

LLCs are the most common: 389 of 586 businesses on record (66%), followed by Corporations with 108 (18%).

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 Mercer County, Illinois?

Use ListRiver's list builder to filter Mercer 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/mercer-county" title="New businesses in Mercer 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/mercer-county">Businesses in Mercer 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.