There are 1 US Post Offices in Borden County serving a total of 275 residents equating to 275 residents per post office. It's estimated that approximately 439 packages are handled across the 1 county post offices annually. Borden County is a rural county located in the U.S. state of Texas. As of the 2010 census, its population was 641, making it the fourth-least populous county in Texas. Its county seat is Gail. The county was created in 1876 and later organized in 1891. Gail and Borden County are named for Gail Borden, Jr., businessman, publisher, surveyor, and inventor of condensed milk. Borden County is one of seven prohibition or entirely dry counties in the state of Texas."