ZIP code 48875 is officially located in the state of Michigan, primarily serving the city of Portland. It falls under the administrative jurisdiction of Ionia County. When planning mail delivery, logistics routing, or demographic research, 48875 operates within the Eastern Time (ET) timezone and supports the 642 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 48875 ZIP Code Tabulation Area is approximately 5,542. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $115,875.