Illinois Number of Private Business Establishments in the NAICS 56162 Security systems 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 450 number of private business establishments in the NAICS 56162 Security systems services Industry. Among all Illinois counties, Cook had the highest number of private business establishments (151), followed by DuPage (38), and Will (25).

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 56162 Security systems services Industry By County in 2025 Q3

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County	Number of Business Establishments
Adams	1
Bond	1
Champaign	4
Christian	2
Clinton	1
Coles	2
Cook	151
Cumberland	1
DeKalb	4
DuPage	38
Effingham	2
Ford	1
Grundy	1
Henderson	1
Jackson	1
Jefferson	1
Kane	19
Kankakee	4
Kendall	4
Knox	1
Lake	23
LaSalle	1
Livingston	2
McHenry	11
McLean	3
Macon	1
Madison	7
Mason	1
Monroe	1
Ogle	1
Peoria	12
Rock Island	4
St. Clair	3
Sangamon	7
Tazewell	6
Vermilion	2
Will	25
Williamson	1
Winnebago	9