Illinois Number of Private Business Establishments in the NAICS 541512 Computer systems design services Industry By County in 2025 Q3 (QCEW)

Updated on April 2, 2026.

According to data from the US Bureau of Labor Statistics, in 2025 Q3, Illinois had 4,686 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 (1,279), followed by DuPage (517), and Lake (258).

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).

See this for other quarters:

Illinois Number of Private Business Establishments in the NAICS 541512 Computer systems design services Industry By County in 2025 Q3

0 of 0

County	Number of Business Establishments
Adams	5
Bond	2
Boone	3
Bureau	3
Cass	2
Champaign	22
Christian	2
Clinton	3
Coles	2
Cook	1279
DeKalb	4
Douglas	2
DuPage	517
Effingham	9
Fayette	1
Ford	1
Franklin	1
Fulton	2
Greene	1
Grundy	2
Hancock	1
Henry	2
Iroquois	1
Jackson	5
Jefferson	2
Kane	118
Kankakee	4
Kendall	19
Knox	1
Lake	258
LaSalle	2
Lee	2
Livingston	2
Logan	2
McDonough	2
McHenry	64
McLean	34
Macon	12
Macoupin	2
Madison	30
Marion	1
Monroe	1
Montgomery	3
Morgan	1
Moultrie	1
Ogle	2
Peoria	23
Rock Island	7
St. Clair	59
Saline	1
Sangamon	50
Schuyler	1
Shelby	3
Stephenson	3
Tazewell	9
Vermilion	3
Wabash	1
White	2
Whiteside	2
Will	202
Williamson	1
Winnebago	21