There are 4 US Post Offices in Latimer County serving a total of 8,864 residents equating to 2,216 residents per post office. It's estimated that approximately 14,148 packages are handled across the 4 county post offices annually. 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 state Constitutional Convention. Prior to statehood, it had been for several decades part of Gaines County, Choctaw Nation.