The Cochise County Sheriff’s Office is the chief law enforcement office in the county. An important duty is to provide law enforcement services to the unincorporated areas of the county; however, the office maintains full law enforcement jurisdiction in all cities and townships within the county. Enforcement duties include criminal investigations and the investigation of all types of traffic accidents. Also under the Sheriff’s Office responsibility is the operating and maintaining of the county jail. All these services have to be provided seven days a week, 24 hours a day. To learn more about the divisions within this office, please see their respective pages.

Southeastern Arizona Communications (SEACOM) is a joint initiative by Cochise County and Sierra Vista to create an independent 911 Communications Center serving all of Cochise County. SEACOM went live on July 18, 2018, when both Cochise County Sheriff's Department dispatch staff and Sierra Vista Police Department's dispatch staff moved into a new facility together. Currently, SEACOM dispatches for all Cochise County Sheriff's office, Huachuca City Police Department, Sierra Vista Police Department, Sierra Vista Fire and Rescue, Fry Fire District, and 18 other rural fire departments.