Caswell is a town in Aroostook County, Maine, United States.

[2] The town was first organized on April 14, 1879, as Pleasant Ridge Plantation, and was later incorporated as Caswell on July 16, 1986.

It has suffered a large decline in population since its peak, partly due to the closure of a saw mill that existed in town, as well as the closure of the nearby Loring Air Force Base in 1994.

There were 176 housing units at an average density of 4.3 per square mile (1.7/km2).

28.4% of all households were made up of individuals, and 14.2% had someone living alone who was 65 years of age or older.

19.3% of all households were made up of individuals, and 7.4% had someone living alone who was 65 years of age or older.