South Bristol is a town in Lincoln County, Maine, United States. The population was 1,127 at the 2020 census. A fishing and resort area, South Bristol includes the villages of Walpole and Christmas Cove, the latter on Rutherford Island. The town has six nature preserves.

Lincoln County is a county located in the U.S. state of Maine. As of the 2020 census, the population was 35,237. Its seat is Wiscasset. The county was founded in 1760 by the Massachusetts General Court from a portion of York County, Massachusetts and named after the English city Lincoln, the birthplace of Massachusetts Bay Provincial Governor Thomas Pownall.