- Police Departments (855 agencies)
- Campus Police (119 agencies)
- Sheriff Offices (68 agencies)
- County Jails (67 agencies)
- Coroners (66 agencies)
- State Police Agencies (48 agencies)
- Adult Institutions (38 agencies)
- Federal Agencies (26 agencies)
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- National Parks (12 agencies)
- Military Police (9 agencies)
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- Airport Police (8 agencies)
- State Agencies (4 agencies)
- Youth Institutions (4 agencies)
- Ports of Entry (3 agencies)
- Transit Authority (3 agencies)
- Harbor Police (3 agencies)
- Conservation Agencies (2 agencies)
- Railroad Police (2 agencies)
- Child Support Enforcement (1 agencies)
