There are 6 US Post Offices in Wilson County serving a total of 38,625 residents equating to 6,438 residents per post office. It's estimated that approximately 61,650 packages are handled across the 6 county post offices annually. Wilson County is a county located in the U.S. state of Texas. As of the 2010 census, its population was 42,918. Its county seat is Floresville. The county is named after James Charles Wilson. Wilson County is part of the San Antonio-New Braunfels, TX Metropolitan Statistical Area."