If available, see below for a list of known police frequencies for Frederick, South Dakota. Or, navigate to another city or town within Brown County, to view the local police frequencies.
| 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 Frederick, South Dakota with these police radar detectors.