ZIP code 04538 is officially located in the state of Maine, primarily serving the city of Capitol island. It falls under the administrative jurisdiction of Lincoln County. When planning mail delivery, logistics routing, or demographic research, 04538 operates within the Eastern Time (ET) timezone and supports the 710 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 04538 ZIP Code Tabulation Area is approximately 6,310. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $86,538.