If available, see below for a list of known police frequencies for Johnstown, Kansas. Or, navigate to another city or town within McPherson County, to view the local police frequencies.
| Canton | Conway | Elyria | Galva | |
| Groveland | Inman | Johnstown | Lindsborg | |
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| Marquette | McPherson | Moundridge | New Gottland | |
| Windom | ||||
Detect police activity and stay ticket-free in Johnstown, Kansas with these police radar detectors.