ZIP code 94931 is officially located in the state of California, primarily serving the city of Cotati. It falls under the administrative jurisdiction of Sonoma County. When planning mail delivery, logistics routing, or demographic research, 94931 operates within the Pacific Time (PT) timezone and supports the 333 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 94931 ZIP Code Tabulation Area is approximately 41,633. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $67,931.