Mongo is an unincorporated village in Springfield Township, LaGrange County, Indiana. The name Mongo derives from the early settlers' name for the area: Mongoquinong. Although An Illustrated Historical Atlas of LaGrange County, Indiana (1874) translates this as "Big Squaw Village", is presently thought to be a corruption of the Miami-Illimois maankwahkionka, meaning "In the Loon Land".