If available, see below for a list of known police frequencies for Castalia, Iowa. Or, navigate to another city or town within Winneshiek County, to view the local police frequencies.
| Calmar | Castalia | Decorah | Fort Atkinson | |
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| Jackson Junction | Ossian | Ridgeway | Spillville | |
Detect police activity and stay ticket-free in Castalia, Iowa with these police radar detectors.