If available, see below for a list of known police frequencies for Henderson, Illinois. Or, navigate to another city or town within Knox County, to view the local police frequencies.
| Abingdon | Altona | East Galesburg | Galesburg | |
| Henderson | Knoxville | Maquon | Oneida | |
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| Rio | St Augustine | Victoria | Wataga | |
| Williamsfield | Yates City | |||
Detect police activity and stay ticket-free in Henderson, Illinois with these police radar detectors.