ZIP code 51449 is officially located in the state of Iowa, primarily serving the city of Lake city. It falls under the administrative jurisdiction of Calhoun County. When planning mail delivery, logistics routing, or demographic research, 51449 operates within the Central Time (CT) timezone and supports the 311 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 51449 ZIP Code Tabulation Area is approximately 9,411. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $73,449.