North American Industry Classification System (NAICS) code 56161 is used by federal buyers for market research, set-aside size standards, and reporting. Official titles come from the Census Bureau NAICS structure.
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.
Included activity examples
- Armored car services
- Bodyguard services
- Polygraph services
- Private detective services
- Security guard services
- Official title
- Investigation, Guard, and Armored Car Services
- Code level
- 5
- Parent industry
- Investigation and Security Services 5616
- Open opportunities
- 0 open · 0 active
Excluded or separately classified activities
Official Census cross-references identify activities that belong under another North American Industry Classification System (NAICS) code.
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; and
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.
Source and edition
2022 NAICS Manual definition and reference material from the U.S. Census Bureau.