The Dunstan River is a 6.0-mile-long (9.7 km) river in the town of Scarborough in Cumberland County, Maine. Its lower portion flows through salt marshes, and it is a tributary of the tidal Scarborough River.
- U.S. Geological Survey Geographic Names Information System: Dunstan River
- Maine Streamflow Data from the USGS
- Maine Watershed Data From Environmental Protection Agency
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