ZIP code 61201 is officially located in the state of Illinois, primarily serving the city of Rock island. It falls under the administrative jurisdiction of Rock Island County. When planning mail delivery, logistics routing, or demographic research, 61201 operates within the Central Time (CT) timezone and supports the 861 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 61201 ZIP Code Tabulation Area is approximately 40,761. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $57,201.