Companies in Chicago: 248,519 businesses, the headquarters downtown and in the suburbs

This page is for people who need to find, check or reach companies in the Chicago area: job seekers, procurement teams looking for local suppliers, researchers, and B2B sellers working out where their next accounts are. It covers the size and shape of the market first, then the big headquarters, then the public records that let you find and vet any business, large or small.

How many businesses are in Chicago

The Census Bureau's County Business Patterns (CBP) counts every business location with paid employees. Its metro area for Chicago spans 13 counties in Illinois and Indiana. For the Chicago-Naperville-Elgin, IL-IN Metro Area (CBSA 16980) in 2023:

DeKalb, Grundy and Kendall counties in Illinois and Jasper and Newton counties in Indiana make up the remaining 6,747 establishments. Cook County, which includes the city, has 54.1% of the establishments and 58.2% of the jobs.

By size, 146,092 establishments have one to four employees and 311 have 1,000 or more:

What kinds of companies Chicago has

Average pay is our calculation from CBP payroll. Two lines stand out. Manufacturing sites average 39.9 employees each, more than twice the metro average, so a modest number of plants employ 370,871 people. And the 1,601 corporate, subsidiary and regional managing offices in NAICS 55 average 109 employees each, a sign of how many large head offices the region has. For two industries in detail, see construction companies in Chicago and trucking companies in Chicago.

CBP counts establishments rather than companies, so a bank's 50 branches count 50 times. It excludes the self-employed and businesses without employees, and employment is for the pay period including March 12, 2023.

The biggest headquarters: city and suburbs

World Business Chicago, the city's economic development organization, counts 30 Fortune 500 companies in the region. These are the 20 largest SEC-registered public companies in the metro by revenue in their latest 10-K, split by where the 10-K cover puts the principal executive office:

Fiscal years are calendar 2025 except Conagra (year to May 2026), Ulta (year to January 2026) and US Foods (year to December 27, 2025). The city's headquarters lean to food, airlines, real estate services and utilities; the suburbs to pharmaceuticals, medical products and distribution. The ranked list of the top 30 is on our largest companies in Chicago page.

Finding and checking Chicago companies

The license dataset is the most useful free list most people don't know about. Filter it by community area and business activity, keep only licenses that haven't expired, and you have a list of operating businesses in, say, West Loop restaurants or Pilsen auto repair shops, with addresses. It covers only businesses licensed by the city, so suburban companies need the Illinois or Indiana state records instead.

To vet a supplier, confirm the entity with the Secretary of State, check the city license (or the suburb's) if the work needs one, and ask for references from companies your size.

Prospecting Chicago companies

Chicago's mix of large head offices and dense logistics makes two very different markets. At the head offices, buying for many sites happens centrally and goes through procurement. In the distribution corridors of Will, DuPage and Cook counties, most warehouses and trucking firms are mid-sized and owner- or general-manager-led: in the metro, 29,422 establishments have 20 to 99 employees.

Illustrative example. The company, rates and results are fictional, to show the method.

Prairie Freight Audit (prairiefreight.example) checks carrier invoices for shippers and wants warehouses and distributors in Will County.

• Metro transportation and warehousing establishments: 17,514.
• Will County has 6.9% of all metro establishments, so Prairie starts from about 1,200, knowing the real share is probably higher in this sector.
• It adds wholesale distributors, which ship heavily, and drops couriers and transit operators that don't buy freight.
• It targets the logistics or transportation manager at sites with 50 or more employees, where freight spend is large enough to audit.

Finding which of those sites are warehouses that ship, not offices or terminals, takes account-by-account research. Bebop can search for "Will County distribution centers with 50 to 500 employees that opened or expanded since 2025" and explain why each fits.

Subject: [Company]'s carrier invoices

Hi [first name],

Sites shipping the volume [Company] does out of [Joliet / Bolingbrook] usually overpay on a few percent of carrier invoices, mostly on accessorial charges and duplicate billing.

We audit freight invoices for Will County shippers and keep a share of what we recover, so there's no cost if we find nothing. Could I run last quarter's invoices for you as a test?

[Your name], Prairie Freight Audit

Next step: build the list itself with how to build a prospect list.