Latimer County is a county located in the southeastern part of the U.S. state of Oklahoma. Its county seat is Wilburton. As of the 2010 census, the population was 11,154. The county was created at statehood in 1907 and named for James L. Latimer, a delegate from Wilburton to the 1906 Constitutional Convention. Prior to statehood, it had been part of Gaines County, Choctaw Nation.