ZIP code 48818 is officially located in the state of Michigan, primarily serving the city of Crystal. It falls under the administrative jurisdiction of Montcalm County. When planning mail delivery, logistics routing, or demographic research, 48818 operates within the Eastern Time (ET) timezone and supports the 638 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 48818 ZIP Code Tabulation Area is approximately 40,538. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $46,818.