ZIP code 77979 is officially located in the state of Texas, primarily serving the city of Port lavaca. It falls under the administrative jurisdiction of Calhoun County. When planning mail delivery, logistics routing, or demographic research, 77979 operates within the Central Time (CT) timezone and supports the 365 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 77979 ZIP Code Tabulation Area is approximately 5,965. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $83,979.