Police Departments in O'fallon, MO

There are 2 police stations in O'fallon, Missouri. Addresses, contact info, and details below — from federal HIFLD, USFA & CMS data (2026).

O'fallon Police Department

Local Police Department
100 North Main Street, MO 63366
(636) 379-5655
Directions

Saint Charles County Sheriffs Department

Sheriff's Office
101 Sheriff Dierker Court, MO 63366
(636) 949-0809
Directions

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