Illinois Number of Private Business Establishments in the NAICS 541330 Engineering 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 2,488 number of private business establishments in the NAICS 541330 Engineering services Industry. Among all Illinois counties, Cook had the highest number of private business establishments (621), followed by DuPage (271), and Lake (105).

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 541330 Engineering services Industry By County in 2025 Q2

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County	Number of Business Establishments
Adams	5
Bond	1
Boone	1
Cass	1
Champaign	27
Clinton	8
Coles	3
Cook	621
Crawford	4
DeKalb	8
Douglas	1
DuPage	271
Edgar	1
Effingham	6
Fayette	2
Franklin	2
Greene	1
Grundy	7
Hardin	1
Henry	3
Iroquois	1
Jackson	9
Jasper	2
Jefferson	3
Jersey	2
Jo Daviess	7
Kane	65
Kankakee	5
Kendall	8
Knox	1
Lake	105
LaSalle	6
Lee	1
McHenry	35
McLean	9
Macon	12
Macoupin	1
Madison	33
Marshall	2
Massac	2
Monroe	3
Montgomery	1
Morgan	3
Moultrie	1
Ogle	4
Peoria	29
Pike	1
Richland	3
Rock Island	19
St. Clair	28
Sangamon	28
Shelby	2
Stephenson	5
Tazewell	14
Vermilion	1
Wabash	1
Warren	1
Washington	3
Whiteside	2
Will	89
Williamson	4
Winnebago	31
Woodford	4