ZIP code 51247 is officially located in the state of Iowa, primarily serving the city of Rock valley. It falls under the administrative jurisdiction of Sioux County. When planning mail delivery, logistics routing, or demographic research, 51247 operates within the Central Time (CT) timezone and supports the 833 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 51247 ZIP Code Tabulation Area is approximately 41,433. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $139,247.