Massachusetts Number of Private Business Establishments in the NAICS 561621 Security systems services, except locksmiths 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, Massachusetts had 197 number of private business establishments in the NAICS 561621 Security systems services, except locksmiths Industry. Among all Massachusetts counties, Middlesex had the highest number of private business establishments (38), followed by Norfolk (22), and Essex (21).

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: Massachusetts BLS Topic List.

Data Source: US Bureau of Labor Statistics (QCEW).

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Massachusetts Number of Private Business Establishments in the NAICS 561621 Security systems services, except locksmiths Industry By County in 2025 Q3

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County	Number of Business Establishments
Barnstable	7
Berkshire	4
Bristol	18
Dukes	3
Essex	21
Franklin	1
Hampden	9
Hampshire	1
Middlesex	38
Norfolk	22
Plymouth	8
Suffolk	16
Worcester	15