If available, see below for a list of known police frequencies for Mason, Illinois. Or, navigate to another city or town within Effingham County, to view the local police frequencies.
| Altamont | Beecher City | Dieterich | Edgewood | |
| Effingham | Mason | Montrose | Shumway | |
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| Teutopolis | Watson | |||
Detect police activity and stay ticket-free in Mason, Illinois with these police radar detectors.