If available, see below for a list of known police frequencies for Grass Valley, Oregon. Or, navigate to another city or town within Sherman County, to view the local police frequencies.
| Biggs Junction | De Moss Springs | Erskine | Grass Valley | |
| Harmony | Kent | Klondike | Locust Grove | |
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| McDonald | Monkland | Moro | Rufus | |
| Rutledge | Wasco | |||
Detect police activity and stay ticket-free in Grass Valley, Oregon with these police radar detectors.