NAICS Code 561611 Investigation Services


Administrative and Support and Waste Management and Remediation Services


This U.S. industry comprises establishments primarily engaged in providing investigation and detective services.

Cross References

Establishments primarily engaged in providing credit checks are classified in Industry 561450, Credit Bureaus.

Illustrative Examples

  • Fingerprinting services
  • Polygraph services
  • Private investigative services
  • Private detective services

Industries Included

  • Background check services
  • Bounty hunting services
  • Detective agencies
  • Fingerprint services
  • Investigation services (except credit), private
  • Investigators, private
  • Lie detection services
  • Missing person tracing services
  • Polygraph services
  • Private detective services
  • Private investigation services (except credit)
  • Skip tracing services

Industry Leaders

Free Business Search - NAICS 561611

Industry Overview

Total Companies:6805

Est. Employment:20212