ZIP code 78957 is officially located in the state of Texas, primarily serving the city of Smithville. It falls under the administrative jurisdiction of Bastrop County. When planning mail delivery, logistics routing, or demographic research, 78957 operates within the Central Time (CT) timezone and supports the 699 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 78957 ZIP Code Tabulation Area is approximately 39,199. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $109,957.