- Police Departments (245 agencies)
- Parole & Probation (163 agencies)
- Adult Institutions (71 agencies)
- Campus Police (69 agencies)
- County Jails (68 agencies)
- Sheriff Offices (67 agencies)
- Federal Agencies (44 agencies)
- Youth Institutions (40 agencies)
- Probation & Pretrial Facilities (27 agencies)
- Coroners (22 agencies)
- State Police Agencies (20 agencies)
- Airport Police (17 agencies)
- Ports of Entry (15 agencies)
- Military Police (14 agencies)
- National Parks (11 agencies)
- Federal Corrections (8 agencies)
- State Agencies (5 agencies)
- Harbor Police (4 agencies)
- Transit Authority (3 agencies)
- Railroad Police (3 agencies)
- Tribal Police (2 agencies)
- Conservation Agencies (1 agencies)
- Child Support Enforcement (1 agencies)
