Thornton Academy (often abbreviated as TA) is a co-educational private/public boarding and day school serving grades 6–12 located in Saco, Maine for Saco and Dayton, Maine student as their public high school. Thornton Academy Middle School, a co-education private/public day school, serves grades 6-8 for Saco, Dayton, Arundel, Biddeford, and Kennebunk students.