2022 NAICS industry in sector 56 Administrative and Support and Waste Management and Remediation Services
56161 Investigation, Guard, and Armored Car Services
NAICS 56161 is the US industry code for investigation, guard, and armored car services. It covers establishments primarily engaged in providing one or more of the following: (1) investigation, detective, and personal background check services; (2) guard and patrol services; and (3) picking up and delivering money, receipts, or other valuable items with personnel and equipment to protect such properties while in transit.
Official definition
This industry comprises establishments primarily engaged in providing one or more of the following: (1) investigation, detective, and personal background check services; (2) guard and patrol services; and (3) picking up and delivering money, receipts, or other valuable items with personnel and equipment to protect such properties while in transit.
Examples Census gives
- Armored car services
- Private detective services
- Bodyguard services
- Security guard services
- Polygraph services
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Establishments primarily engaged in providing credit checks are classified in Industry 56145, Credit Bureaus.
- Establishments primarily engaged in selling, installing, monitoring, and maintaining security systems and devices (e.g., burglar and fire alarm systems) are classified in Industry 56162, Security Systems Services.
- Government establishments primarily engaged in criminal and civil law enforcement, police, traffic safety, and similar activities related to the enforcement of law are classified in Industry 92212, Police Protection.
Codes in 56161
Data last changed November 14, 2026. How this page is built.