- Police Departments (348 agencies)
- Campus Police (166 agencies)
- Sheriff Offices (125 agencies)
- Parole & Probation (104 agencies)
- Federal Agencies (69 agencies)
- County Jails (66 agencies)
- Coroners (58 agencies)
- State Police Agencies (34 agencies)
- Adult Institutions (33 agencies)
- Military Police (31 agencies)
- Airport Police (20 agencies)
- National Parks (19 agencies)
- Probation & Pretrial Facilities (13 agencies)
- Ports of Entry (12 agencies)
- Harbor Police (10 agencies)
- Federal Corrections (9 agencies)
- Tribal Police (8 agencies)
- Transit Authority (5 agencies)
- State Agencies (4 agencies)
- Railroad Police (3 agencies)
- Conservation Agencies (1 agencies)
- Child Support Enforcement (1 agencies)
