ZIP code 45770 is officially located in the state of Ohio, primarily serving the city of Portland. It falls under the administrative jurisdiction of Meigs County. When planning mail delivery, logistics routing, or demographic research, 45770 operates within the Eastern Time (ET) timezone and supports the 304 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 45770 ZIP Code Tabulation Area is approximately 22,004. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $130,770.