Illinois Number of Private Business Establishments in the NAICS 541511 Custom computer programming services Industry By County in 2025 Q1 (QCEW)

Updated on April 2, 2026.

According to data from the US Bureau of Labor Statistics, in 2025 Q1, Illinois had 7,354 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 (1,658), followed by DuPage (548), and Lake (264).

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 Q1

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County	Number of Business Establishments
Adams	5
Bond	1
Boone	5
Champaign	55
Christian	1
Clinton	2
Cook	1658
DeKalb	8
DuPage	548
Edwards	1
Effingham	2
Ford	1
Grundy	5
Hamilton	1
Henry	2
Jackson	5
Jefferson	2
Jo Daviess	1
Kane	118
Kankakee	4
Kendall	27
Knox	1
Lake	264
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	36
Piatt	2
Rock Island	17
St. Clair	49
Sangamon	58
Shelby	1
Stephenson	3
Tazewell	19
Vermilion	1
Wayne	1
Whiteside	1
Will	180
Williamson	4
Winnebago	19