ZIP code 75670 is officially located in the state of Texas, primarily serving the city of Marshall. It falls under the administrative jurisdiction of Harrison County. When planning mail delivery, logistics routing, or demographic research, 75670 operates within the Central Time (CT) timezone and supports the 501 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 75670 ZIP Code Tabulation Area is approximately 29,201. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $130,670.