If available, see below for a list of known police frequencies for South River, New Jersey. Or, navigate to another city or town within Middlesex County, to view the local police frequencies.
| Carteret | Dunellen | Helmetta | Highland Park | |
| Jamesburg | Metuchen | Middlesex | Milltown | |
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| New Brunswick | Perth Amboy | Sayreville | South Amboy | |
| South Plainfield | South River | Spotswood | ||
Detect police activity and stay ticket-free in South River, New Jersey with these police radar detectors.