ZIP code 57764 is officially located in the state of South dakota, primarily serving the city of Oglala. It falls under the administrative jurisdiction of Shannon County. When planning mail delivery, logistics routing, or demographic research, 57764 operates within the Mountain Time (MT) timezone and supports the 796 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 57764 ZIP Code Tabulation Area is approximately 39,996. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $128,764.