These local law enforcement agencies use the Washington County emergency communications system:
- City of Banks Police, provided through the Sheriff's Office
- City of Beaverton Police Department
- City of Cornelius, provided through the Sheriff's Office
- City of Durham, provided through Tigard Police Department
- City of Forest Grove Police Department
- City of Gaston, provided through the Sheriff's Office
- City of Hillsboro Police Department
- City of King City Police Department
- City of North Plains Police Department
- City of Sherwood Police Department
- City of Tigard Police Department
- City of Tualatin Police Department
- Washington County Sheriff's Office