Monthly report

New businesses in Illinois: September 2026

13,542 new businesses were formed in Illinois in September 2026, up 2% from August and up 78% from September 2025.

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Every new one in Illinois, every month

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About 13,975 new businesses a month. Your first file today, then a new file each month with only the new ones, never repeats. Cancel any time. Or $700 a year (2 months free).

One-time list

All 13,542 Illinois businesses formed in September 2026

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$0.015 per record. A CSV with every column, plus 6 monthly refreshes.

New businesses
13,542
September 2026
Month over month
+2%
vs 13,225
Year over year
+78%
vs 7,609
Most common type
LLC
84% of formations

New Illinois businesses per month

010,00020,000Sep 2024: 5,635Sep 24Oct 2024: 5,516Nov 2024: 6,928Dec 2024: 8,102Jan 2025: 9,5532025Feb 2025: 8,225Mar 2025: 8,560Apr 2025: 8,941May 2025: 8,361Jun 2025: 8,357Jul 2025: 9,493Aug 2025: 7,381Sep 2025: 7,609Oct 2025: 7,293Nov 2025: 10,862Dec 2025: 11,889Jan 2026: 13,9642026Feb 2026: 12,759Mar 2026: 18,704Apr 2026: 15,920May 2026: 13,759Jun 2026: 14,045Jul 2026: 15,158Aug 2026: 13,225Sep 2026: 13,542

By entity type

  • LLCs11,333 · 84%
  • Corporations1,675 · 12%
  • Nonprofits525 · 4%
  • Other8 · 0%
  • LLPs1 · 0%

Top counties in September 2026

Top cities in September 2026

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The 13,542 businesses counted above are available as a file: name, address, entity type, formation month and, where the state publishes it, the registered agent.

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One file every month with the businesses newly registered across 12 states since the file before (more than 170,000 in the latest one). Cancel any time.

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Every business formed in the last 12 months across 15 states: more than 2.2 million records, one CSV per state, with 2 monthly updates included.

The formation date in the files is the year and month. Most records have no email address or EIN.

Get the list of 13,542 new Illinois businesses from September 2026

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. U.S.-based businesses can pay 20% today and the rest over 6 months with Pay-in-6™, building business credit as they pay.

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Methodology

Counts are businesses registered with the state of Illinois whose formation (registration) date falls in September 2026 and that appear on the state register in ListRiver's data as of October 20, 2026. Businesses already dissolved are not counted, so older months can drift slightly as records change. City and county refer to the business address on file. More in the methodology.

Cite this report: ListRiver, “New businesses in Illinois: September 2026”, https://listriver.com/reports/new-businesses/illinois/2026-09. Journalists and researchers are welcome to use these figures with a link.

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