The Oyster River is a tributary of the St. George River in Knox County, Maine. From its source () in Rockport, the river runs U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed June 22, 2011 south and southwest to its confluence with the Saint George. Its lower third forms the border between Warren and Thomaston.
See also East Branch Oyster River West Branch Oyster River List of rivers of Maine
References
Maine Streamflow Data from the USGS Maine Watershed Data From Environmental Protection Agency