Mule Barn was a town in Pawnee County, Oklahoma, United States. It was located west-northwest of Tulsa, on the west side of Keystone Lake. Its population was zero on both the 1990 and 2000 censuses. According to the United States Census Bureau, the town had a total area of 0.0 sqmi, all land. The town was located at 36.21737 N, 96.31142 W. Oklahoma law provides for the dissolution of towns under certain circumstances, including the lack of recent elections. Mule Barn was dissolved in 2008.