ZIP code 51002 is officially located in the state of Iowa, primarily serving the city of Alta. It falls under the administrative jurisdiction of Buena Vista County. When planning mail delivery, logistics routing, or demographic research, 51002 operates within the Central Time (CT) timezone and supports the 835 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 51002 ZIP Code Tabulation Area is approximately 42,135. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $74,002.