Auburn is a city in and the county seat of Androscoggin County, Maine, United States. The population was 23,055 at the 2010 census. Auburn and Lewiston (directly across the Androscoggin River) are known locally as the Twin Cities or Lewiston-Auburn (L-A).

The area was originally part of the Pejepscot Purchase, land bought in 1714 by a consortium from Boston and Portsmouth following the Treaty of Portsmouth, which brought peace between the Abenaki Indians and English settlements. In 1736, however, the Massachusetts General Court granted a large section of the land to veterans of the 1690 Battle of Quebec. Conflicting claims led to prolonged litigation; consequently, settlement was delayed until after the French and Indian Wars.

Auburn was first settled in 1786 as part of Bakerstown, renamed Poland when it was incorporated by the Massachusetts General Court in 1795. It was then part of Minot, set off from Poland and incorporated in 1802. Auburn would itself be set off and incorporated on February 24, 1842. The name was apparently inspired by "Auburn", a village (real or fictitious) featured in the 1770 poem "The Deserted Village" by Oliver Goldsmith. Originally part of Cumberland County, the town became county seat of Androscoggin County at its creation in 1854. By annexing land from towns around it, including part of Poland in 1852, Minot in 1873, and all of Danville (first called Pejepscot) in 1867, Auburn grew geographically into one of Maine's largest municipalities. Incorporated a city in 1868, Auburn in 1917 would be the first city in the state to adopt a council-manager form of government.

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