Illinois Number of Private Business Establishments in the NAICS 5413 Architectural and engineering 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 4,819 number of private business establishments in the NAICS 5413 Architectural and engineering services Industry. Among all Illinois counties, Cook had the highest number of private business establishments (1,645), followed by DuPage (498), and Lake (261).

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 5413 Architectural and engineering services Industry By County in 2025 Q1

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County	Number of Business Establishments
Adams	6
Bond	4
Boone	3
Brown	1
Bureau	2
Carroll	3
Cass	4
Champaign	58
Clay	1
Clinton	11
Coles	4
Cook	1645
Crawford	7
Cumberland	1
DeKalb	12
DuPage	498
Edgar	2
Edwards	1
Effingham	10
Fayette	3
Franklin	7
Fulton	1
Greene	1
Grundy	13
Hancock	1
Hardin	1
Henderson	1
Henry	6
Iroquois	3
Jackson	12
Jasper	2
Jefferson	7
Jersey	5
Jo Daviess	10
Johnson	2
Kane	153
Kankakee	14
Kendall	26
Knox	1
Lake	261
LaSalle	17
Lee	1
Livingston	4
McDonough	1
McHenry	88
McLean	24
Macon	23
Macoupin	1
Madison	56
Marion	4
Marshall	3
Massac	2
Menard	1
Mercer	1
Monroe	8
Montgomery	4
Morgan	3
Moultrie	2
Ogle	10
Peoria	44
Piatt	4
Pike	2
Putnam	1
Richland	4
Rock Island	28
St. Clair	43
Saline	3
Sangamon	58
Shelby	5
Stark	1
Stephenson	7
Tazewell	26
Union	2
Vermilion	4
Wabash	3
Warren	1
Washington	4
Wayne	1
Whiteside	5
Will	183
Williamson	15
Winnebago	60
Woodford	9