ZIP code 81123 is officially located in the state of Colorado, primarily serving the city of Blanca. It falls under the administrative jurisdiction of Costilla County. When planning mail delivery, logistics routing, or demographic research, 81123 operates within the Mountain Time (MT) timezone and supports the 484 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 81123 ZIP Code Tabulation Area is approximately 41,784. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $131,123.