Alna is a town in Lincoln County, Maine, United States. The population was 710 at the 2020 census. Alna is home to the Wiscasset, Waterville and Farmington Railway Museum and is noted for its historic architecture, including the early mill village of Head Tide.

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.