Markles is an unincorporated community in southern Otter Creek Township, Vigo County, in the U.S. state of Indiana. Within the boundaries of Terre Haute, it is also part of the Terre Haute metropolitan area. The town is home to Markles Cemetery. Geography Markles is located at at an elevation of 502 feet. References Unincorporated communities in Indiana Unincorporated communities in Vigo County, Indiana Terre Haute metropolitan area