ZIP code 15904 is officially located in the state of Pennsylvania, primarily serving the city of Johnstown. It falls under the administrative jurisdiction of Cambria County. When planning mail delivery, logistics routing, or demographic research, 15904 operates within the Eastern Time (ET) timezone and supports the 320 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 15904 ZIP Code Tabulation Area is approximately 26,920. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $108,904.