ZIP code 75661 is officially located in the state of Texas, primarily serving the city of Karnack. It falls under the administrative jurisdiction of Harrison County. When planning mail delivery, logistics routing, or demographic research, 75661 operates within the Central Time (CT) timezone and supports the 602 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 75661 ZIP Code Tabulation Area is approximately 38,402. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $77,661.