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Sheriff

Sheriff Frank Denning
Sheriff

The Johnson County Sheriff’s Office has grown from a one man department to an internationally recognized leading organization in the law enforcement community. The Sheriff’s Office now employs over 450 sworn Deputies and over 125 Civilian employees. With a full range of public safety duties including two Adult Detention Centers, Road Patrol, Communications, Investigations, Warrants, Civil Division, a Criminalistics Laboratory, and many other Divisions, the Sheriff’s Office is able to provide quality law enforcement to the citizens of Johnson County.

The one thing that has not changed since 1861 is the Sheriff of Johnson County still serves every resident and visitor of the county, providing a safe place to live, go to school, work and play. The Johnson County Sheriff’s Office is one of the fastest growing law enforcement agencies in the Midwest.

Johnson County is rich with history including a very famous Constable by the name of James Butler Hickok, better known as Wild Bill Hickok. Hickok served as a Constable of the Monticello Township in Johnson County in 1858 while during the same time; Pat Cosgrove served as the Territorial Sheriff.

The Sheriff’s Office operates out of eight main buildings located throughout Johnson County. These include the Sheriff’s Office Criminalistics Laboratory, Central Booking Facility, New Century Adult Detention Center, Operations Building, and Training Center; along with the County Communications Center, 588/Justice Annex and the Courthouse.