If available, see below for a list of known police frequencies for St Joseph County in Michigan. Or, navigate to your city or town to view your local city and/or police frequencies within St Joseph County, Michigan.
| Burr Oak | Centreville | Colon | Constantine | |
| Leonidas | Mendon | Nottawa | Sturgis | |
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| Three Rivers | White Pigeon | |||
Detect police activity and stay ticket-free in St Joseph County with these police radar detectors.