ZIP code 94591 is officially located in the state of California, primarily serving the city of Vallejo. It falls under the administrative jurisdiction of Solano County. When planning mail delivery, logistics routing, or demographic research, 94591 operates within the Pacific Time (PT) timezone and supports the 224 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 94591 ZIP Code Tabulation Area is approximately 36,624. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $87,591.