If available, see below for a list of known police frequencies for Greencastle, Pennsylvania. Or, navigate to another city or town within Franklin County, to view the local police frequencies.
| Chambersburg | Greencastle | Mercersburg | Mont Alto | |
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| Orrstown | Shippensburg | Waynesboro | ||
Detect police activity and stay ticket-free in Greencastle, Pennsylvania with these police radar detectors.