Illinois Number of Private Business Establishments in the NAICS 541512 Computer systems design 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 4,614 number of private business establishments in the NAICS 541512 Computer systems design services Industry. Among all Illinois counties, Cook had the highest number of private business establishments (1,264), followed by DuPage (512), and Lake (259).

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 541512 Computer systems design services Industry By County in 2025 Q2

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County	Number of Business Establishments
Adams	5
Bond	2
Boone	3
Bureau	3
Cass	2
Champaign	22
Christian	2
Clinton	3
Coles	2
Cook	1264
DeKalb	4
Douglas	2
DuPage	512
Effingham	9
Fayette	1
Ford	1
Franklin	1
Fulton	2
Greene	1
Grundy	2
Hancock	1
Henry	2
Iroquois	1
Jackson	6
Jefferson	2
Kane	117
Kankakee	4
Kendall	19
Knox	1
Lake	259
LaSalle	2
Lee	2
Livingston	2
Logan	2
McDonough	2
McHenry	61
McLean	34
Macon	12
Macoupin	2
Madison	30
Marion	1
Monroe	1
Montgomery	3
Morgan	1
Moultrie	1
Ogle	2
Peoria	23
Rock Island	6
St. Clair	60
Saline	1
Sangamon	49
Schuyler	1
Shelby	3
Stephenson	3
Tazewell	9
Vermilion	3
Wabash	1
White	2
Whiteside	2
Will	200
Williamson	1
Winnebago	21