The Halfmoon River is a 4.6-mile-long (7.4 km) tidal river in the U.S. state of Georgia. It flows through saltmarshes connected to Wilmington Island in Chatham County, ending at Wassaw Sound, an arm of the Atlantic Ocean.
- U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed April 26, 2011
- U.S. Geological Survey Geographic Names Information System: Halfmoon River
- USGS Hydrologic Unit Map - State of Georgia (1974)
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