Industry Description
This U.S. industry comprises establishments primarily engaged in providing investigation and detective services.
Illustrative Examples:
Fingerprinting services
Private detective services
Polygraph services
Private investigative services
Cross-References.
Business Examples
Common types of business activities within NAICS 561611 - Investigation Services are:
- Detective agencies
- Background check services
- Investigators, private
- Lie detection services
- Bounty hunting services
- Skip tracing services
- Private detective services
- Fingerprint services
- Private investigation services (except credit)
- Missing person tracing services
- Polygraph services
- Investigation services (except credit), private
IBISWorld Industry Research Report
Security Services in the US (56161)
Revenue 2025
$49.1bn
Growth 2025
0.73%
Key Trends
Industry profit growth has been limited due to intense price competition
An economic recovery in the latter half of the period has aided rising demand from downstream markets
Major players will be able to provide enhanced and comprehensive services
Products and Services
Similar Industries
For some business types, there may be a similar industry to 561611 - Investigation Services that is a better classification match. Establishments primarily engaged in:
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NAICS Cross Reference
Establishments primarily engaged in providing credit checks are classified in Industry 561450, Credit Bureaus.
IBISWorld industry research report
NAICS Hierarchy 561611 - Investigation Services
NAICS Code 561611 - Investigation Services sits in the 2-digit Investigation Services sector. NAICS codes can be 2- to 6-digits and the further along the hierarchy, the more detailed and specific the category will be. Learn more about the structure of NAICS codes
2 Digits: 56
Sector Title: Administrative and Support and Waste Management and Remediation Services
3 Digits 4 Digits 5 Digits 6 Digits
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5611 Office Administrative Services
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56111 Office Administrative Services
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5612 Facilities Support Services
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56121 Facilities Support Services
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5613 Employment Services
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56131 Employment Placement Agencies and Executive Search Services
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56132 Temporary Help Services
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56133 Professional Employer Organizations
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5614 Business Support Services
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56141 Document Preparation Services
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56142 Telephone Call Centers
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56143 Business Service Centers
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56144 Collection Agencies
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56145 Credit Bureaus
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56149 Other Business Support Services
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5615 Travel Arrangement and Reservation Services
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56151 Travel Agencies
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56152 Tour Operators
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56159 Other Travel Arrangement and Reservation Services
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5616 Investigation and Security Services
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56161 Investigation, Guard, and Armored Car Services
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56162 Security Systems Services
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5617 Services to Buildings and Dwellings
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56171 Exterminating and Pest Control Services
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56172 Janitorial Services
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56173 Landscaping Services
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56174 Carpet and Upholstery Cleaning Services
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56179 Other Services to Buildings and Dwellings
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5619 Other Support Services
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56191 Packaging and Labeling Services
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56192 Convention and Trade Show Organizers
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56199 All Other Support Services
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5621 Waste Collection
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56211 Waste Collection
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5622 Waste Treatment and Disposal
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5629 Remediation and Other Waste Management Services
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56291 Remediation Services
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56292 Materials Recovery Facilities
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56299 All Other Waste Management Services
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Similar Industries Niche and Emerging
IBISWorld provides research on hundreds of niche and emerging industries, including the following for 561611 - Investigation Services.
NAICS Resources
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