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Aroostook County MEGenWeb is a free genealogical site about the history of the county. We hope you find helpful clues for your research of Aroostook county ancestors.

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Temporary County Coordinator: Norma Hass normahass01@gmail.com

COUNTY FORMATION

Aroostook County was formed in 1839, from northern parts of Penobscot and Washington counties. Its name came from an Algonquian word referring to the Saint John River as "beautiful river." In 1842, following the Aroostook War between the US and Great Britain, the Webster-Ashburton Treaty set the US/Canadian boundary, essentially expanding Aroostook County northward. In 1843, it gained land to the west from Penobscot County. In 1844, Aroostook again grew further west from portions of Piscataquis and Somerset Counties. In 1889, at its southern border, Aroostook claimed a small portion of Penobscot County, but returned it in 1903.

Aroostook's county seat is Houlton.