Eddington is a town located on the eastern side of the Penobscot River in Penobscot County, Maine, United States. As of the 2010 census, the town had a population of 2,225.
The town was founded by and named after Jonathan Eddy, a militia captain in the French and Indian War, a colonel in the American Revolutionary War, and the first magistrate in the area. Eddy and most of the town's other original settlers migrated to the town from Nova Scotia, where they had supported the rebel cause against the majority British Loyalist population. Eddy tried to make Nova Scotia - the 14th American colony - join the revolution by leading the Siege of Fort Cumberland. After the siege failed, Eddy and others emigrated to the District of Maine and were given land grants in present-day Eddington. Later in the war, Eddy successfully defended Maine from a British attack in the Battle of Machias (1777).
According to the United States Census Bureau, the town has a total area of 26.54 square miles (68.74 km2), of which, 24.99 square miles (64.72 km2) of it is land and 1.55 square miles (4.01 km2) is water.
As of the census of 2010, there were 2,225 people, 930 households, and 643 families living in the town. The population density was 89.0 inhabitants per square mile (34.4/km2). There were 1,037 housing units at an average density of 41.5 per square mile (16.0/km2). The racial makeup of the town was 97.8% White, 0.6% African American, 0.5% Native American, 0.5% Asian, and 0.7% from two or more races.