The Napoleon Police Department is a two person department. Police Chief James Waldo and Police Officer Allen Troy. If the services of the local police department are needed call 701-754-2626 or in an emergency dial 9-1-1. The address is 225 Lake Ave. W.
The Logan County Sheriff is Sheriff Andrew Bartholomaus. His office is located in the Logan County Courthouse and he may be reached by calling 754-2495.