Montrose County Sheriff's Office (MCSO) has been serving Montrose and surrounding communities since 1876. The MCSO has over 100 employees who work in the Patrol ... See more Division, Communications, Detention Center, Work Release, Civil Office, Victims Advocate, Records, and Sheriff's Office Administration. Then there are the 37 volunteers of the Sheriff's Posse who are responsible for coordinating Search and Rescue efforts in Montrose County.