If available, see below for a list of known police frequencies for Washington County in Missouri. Or, navigate to your city or town to view your local city and/or police frequencies within Washington County, Missouri.
| Belgrade | Berryman | Cadet | Caledonia | |
| Courtois | Delbridge | Hopewell | Irondale | |
| Mineral Point | Old Mines | Palmer | Pea Ridge | |
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| Peoria | Potosi | Quaker | Richwoods | |
| Shirley | Tiff | |||
Detect police activity and stay ticket-free in Washington County with these police radar detectors.