If available, see below for a list of known police frequencies for Brown County in South Dakota. Or, navigate to your city or town to view your local city and/or police frequencies within Brown County, South Dakota.
| Aberdeen | Bath | Bath Corner | Claremont | |
| Columbia | Ferney | Frederick | Groton | |
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| Hecla | Mansfield | Stratford | Verdon | |
| Warner | Westport | |||
Detect police activity and stay ticket-free in Brown County with these police radar detectors.