Businesses in Sycamore, Illinois

As of October 20, 2026, ListRiver's records show 1,526 active registered businesses in Sycamore, Illinois. 64% are LLCs. 17 were formed in September 2026.

From official Illinois registry records, updated weekly. Most Sycamore businesses are in Dekalb County. Look up a Illinois business by name.

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Businesses on record
1,526
Formed in the last 12 months
222
Formed in September
17
With a phone number
15%
234 records

New Sycamore businesses per month

01530Oct 2024: 8Oct 24Nov 2024: 9Dec 2024: 14Jan 2025: 122025Feb 2025: 10Mar 2025: 10Apr 2025: 11May 2025: 13Jun 2025: 18Jul 2025: 15Aug 2025: 11Sep 2025: 11Oct 2025: 14Nov 2025: 17Dec 2025: 16Jan 2026: 222026Feb 2026: 18Mar 2026: 30Apr 2026: 19May 2026: 19Jun 2026: 13Jul 2026: 17Aug 2026: 20Sep 2026: 17

Businesses on record by formation month, through September 2026. Monthly Illinois new-business reports · Get the list of 17 new businesses formed in September 2026

Entity types

  • LLCs974 · 64%
  • Corporations378 · 25%
  • Nonprofits173 · 11%
  • Other1 · 0%

Top ZIP codes

Newest business names registered in Sycamore

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BusinessCityTypeFormed
Name hiddenSycamoreLLCOct 2026
Name hiddenSycamoreLLCOct 2026
Name hiddenSycamoreLLCOct 2026
Name hiddenSycamoreLLCOct 2026
Name hiddenSycamoreLLCOct 2026
Name hiddenSycamoreLLCOct 2026
Name hiddenSycamoreLLCOct 2026
Name hiddenSycamoreLLCOct 2026
Name hiddenSycamoreLLCOct 2026
Name hiddenSycamoreLLCOct 2026
Name hiddenSycamoreLLCSep 2026
Name hiddenSycamoreLLCSep 2026
Name hiddenSycamoreLLCSep 2026
Name hiddenSycamoreLLCSep 2026
Name hiddenSycamoreLLCSep 2026
Name hiddenSycamoreLLCSep 2026
Name hiddenSycamoreLLCSep 2026
Name hiddenSycamoreLLCSep 2026
Name hiddenSycamoreLLCSep 2026
Name hiddenSycamoreLLCSep 2026
Name hiddenSycamoreLLCSep 2026
Name hiddenSycamoreLLCSep 2026
Name hiddenSycamoreNonprofitSep 2026
Name hiddenSycamoreCorporationSep 2026
Name hiddenSycamoreNonprofitSep 2026

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Common questions about Sycamore businesses

How many businesses are registered in Sycamore, Illinois?

ListRiver has 1,526 active registered businesses in Sycamore, 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 Sycamore, Illinois in September 2026?

17 businesses on record in Sycamore, Illinois were formed in September 2026.

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

222 businesses on record in Sycamore, Illinois were formed in the 12 months through September 2026.

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

LLCs are the most common: 974 of 1,526 businesses on record (64%), followed by Corporations with 378 (25%).

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 Sycamore, Illinois?

Use ListRiver's list builder to filter Sycamore, 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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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.