There are 38 US Post Offices in Bexar County serving a total of 891,520 residents equating to 23,461 residents per post office. It's estimated that approximately 1,422,965 packages are handled across the 38 county post offices annually. Bexar County (pronounced BAIR) is a county in the U.S. state of Texas. As of the 2010 census, the population was 1,714,773, and a 2013 estimate put the population at 1,817,610. It is the 17th-most populous county in the nation and the fourth-most populated in Texas. Its county seat is San Antonio, the second-most populous city in Texas and the seventh-largest city in the United States. Bexar County is included in the San Antonio-New Braunfels, TX Metropolitan Statistical Area. Bexar county includes Government Canyon state natural area in northwestern part of the county."