Auburn is a city in an the county seat of Androscoggin County, Maine, United States. It is one of two principal cities of and included in the Lewiston-Auburn, Maine Metropolitan New England City and Town Area and the Lewiston-Auburn, Maine Metropolitan Statistical Area (which is part of the Portland-Lewiston-South Portland, Maine Combined Statistical Area). Auburn is across the Androscoggin River from Lewiston. Lake Auburn is a summer resort.