The county's principal peace officer is the Greene County Sheriff, who is elected every four years. The Sheriff and Sheriff's Deputies are the police force for residents of the unincorporated areas of the county, and by contract, provide law enforcement for the cities of Churdan, Dana, Paton and Rippey.
The Sheriff's Office handles all routine and emergency calls for these areas, and regularly patrols all areas of the county.
Greene County also has an Enhanced 911 telephone service, a computerized system that allows the Law Enforcement Center’s dispatcher to know instantly the location from which a 911 call is placed.
The Sheriff's Office also issues permits to purchase and carry firearms; provides security for special events in the county and houses the 8-bed Greene County Jail.