ZIP code 76666 is officially located in the state of Texas, primarily serving the city of Mertens. It falls under the administrative jurisdiction of Hill County. When planning mail delivery, logistics routing, or demographic research, 76666 operates within the Central Time (CT) timezone and supports the 549 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 76666 ZIP Code Tabulation Area is approximately 21,549. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $62,666.