Illinois Number of Private Business Establishments in the NAICS 541511 Custom computer programming services Industry By County in 2025 Q2 (QCEW)

Updated on April 2, 2026.

According to data from the US Bureau of Labor Statistics, in 2025 Q2, Illinois had 7,537 number of private business establishments in the NAICS 541511 Custom computer programming services Industry. Among all Illinois counties, Cook had the highest number of private business establishments (1,688), followed by DuPage (552), and Lake (271).

The chart and table shows the number of business establishments for each county.

You can see similar information for other states, and for the United States.

You can see similar information for other industries.

Related Topics: Illinois BLS Topic List.

Data Source: US Bureau of Labor Statistics (QCEW).

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Illinois Number of Private Business Establishments in the NAICS 541511 Custom computer programming services Industry By County in 2025 Q2

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County	Number of Business Establishments
Adams	5
Bond	1
Boone	5
Champaign	56
Christian	1
Clinton	2
Cook	1688
DeKalb	8
DuPage	552
Edwards	1
Effingham	2
Ford	1
Fulton	1
Grundy	5
Hamilton	1
Henry	2
Jackson	6
Jefferson	2
Jo Daviess	1
Kane	119
Kankakee	4
Kendall	27
Knox	1
Lake	271
LaSalle	10
Lee	1
Logan	1
McDonough	1
McHenry	51
McLean	37
Macon	4
Madison	27
Menard	1
Monroe	7
Morgan	1
Ogle	2
Peoria	37
Piatt	2
Rock Island	17
St. Clair	49
Sangamon	59
Shelby	1
Stephenson	3
Tazewell	19
Vermilion	1
Wayne	1
Whiteside	1
Will	183
Williamson	4
Winnebago	18