If available, see below for a list of known police frequencies for Plymouth, Iowa. Or, navigate to another city or town within Cerro Gordo County, to view the local police frequencies.
| Clear Lake | Dougherty | Mason City | Meservey | |
| Plymouth | Rock Falls | Rockwell | Swaledale | |
|
| ||||
| Thornton | Ventura | |||
Detect police activity and stay ticket-free in Plymouth, Iowa with these police radar detectors.