There are 9 US Post Offices in Emery County serving a total of 11,027 residents equating to 1,225 residents per post office. It's estimated that approximately 17,600 packages are handled across the 9 county post offices annually. Emery County is a county located in the U.S. state of Utah. As of the 2010 census, the population was 10,976. Its county seat is Castle Dale, and the largest city is Huntington. The county was named for George W. Emery, governor of the Utah Territory in 1875."