There are 7 US Post Offices in Gonzales County serving a total of 19,911 residents equating to 2,844 residents per post office. It's estimated that approximately 31,780 packages are handled across the 7 county post offices annually. Gonzales County is a county located in the U.S. state of Texas. As of the 2010 census, its population was 19,807. The county is named for its county seat, the city of Gonzales. The county was created in 1836 and organized the following year."