There are 1 US Post Offices in Roberts County serving a total of 837 residents equating to 837 residents per post office. It's estimated that approximately 1,336 packages are handled across the 1 county post offices annually. Roberts County is a county located in the U.S. state of Texas. As of the 2010 census, its population was 929, making it the seventh-least populous county in Texas. Its county seat is Miami, which is also the county's only incorporated community. The county was created in 1876 and organized in 1889. It is named for Oran Milo Roberts, a governor of Texas. Roberts County is one of 30 prohibition, or entirely dry, counties in the state of Texas."