There are 8 US Post Offices in Coleman County serving a total of 8,720 residents equating to 1,090 residents per post office. It's estimated that approximately 13,918 packages are handled across the 8 county post offices annually. Coleman County is a county located in the U.S. state of Texas. As of the 2010 census, its population was 8,895. The county seat is Coleman. The county was founded in 1858 and organized in 1864. It is named for Robert M. Coleman, a signer of the Texas Declaration of Independence and soldier at the Battle of San Jacinto."