This is a list of school districts in Maine. Public school systems in Maine are in several types of school administrative units: Cities which have their own School Departments, also known as cities with individual supervision; School Administrative Districts (S.A.D.s) typically made up of 2 or more cities who cooperatively provide education to all of their students; Community School Districts (C.S.D.s) in which 2 or more cities cooperate to provide education to some or sometimes all grade levels, Unions of Towns, in which two or more school administrative units share a common superintendent but are otherwise separate, and, in unorganized townships, also known as unorganized territory, schools which are run directly by the state.