If available, see below for a list of known police frequencies for Johnson County in Illinois. Or, navigate to your city or town to view your local city and/or police frequencies within Johnson County, Illinois.
|151.235||Johnson County Sheriff - Dispatch||Johnson County Sheriff|
|155.535||Johnson County Sheriff - Dispatch||Johnson County Sheriff|
|155.58||Johnson County Sheriff - TAC||Johnson County Sheriff|
Detect police activity and stay ticket-free in Johnson County with these police radar detectors.