California Highway Patrol
- California Highway Patrol – Facebook
- California Highway Patrol – Nixle
- California Highway Patrol – Twitter
- California Highway Patrol – Website
- California Highway Patrol – YouTube
Federal Agencies operating in Los Angeles County
Los Angeles County Sheriff's Department
- Los Angeles County Sheriff's Department – Facebook
- Los Angeles County Sheriff's Department – Website
- Los Angeles County Sheriff's Department – Nixle
- Los Angeles County Sheriff's Department – Twitter
- Los Angeles County Sheriff's Department – YouTube
- Sheriffs' Relief Association
Los Angeles Police Deparment
- Los Angeles Police Department – Facebook
- Los Angeles Police Department – Instagram
- Los Angeles Police Department – Twitter
- Los Angeles Police Department – Website
Municipal Agencies (Police Departments in Los Angeles County)
- Alhambra Police Department
- Arcadia Police Department
- Azusa Police Department
- Baldwin Park Police Department
- Bell Gardens Police Department
- Bell Police Department
- Beverly Hills Police Department
- Burbank Police Department
- Claremont Police Department
- Covina Police Department
- Culver City Police Department
- Downey Police Department
- El Monte Police Department
- El Segundo Police Department
- Gardena Police Department
- Glendale Police Department
- Glendora Police Department
- Hawthorne Police Department
- Hermosa Beach Police Department
- Huntington Park Police Department
- Inglewood Police Department
- Irwindale Police Department
- La Verne Police Department
- Long Beach Police Department
- Manhattan Beach Police Department
- Monrovia Police Department
- Montebello Police Department
- Monterey Park Police Department
- Palos Verdes Estates Police Department
- Pasadena Police Department
- Pomona Police Department
- Redondo Beach Police Department
- San Gabriel Police Department
- San Marino Police Department
- Santa Fe Springs Police Department
- Santa Monica Police Department
- Sierra Madre Police Department
- Signal Hill Police Department
- South Pasadena Police Department
- Torrance Police Department
- Vernon Police Department
- West Covina Police Department
- Whittier Police Department