ZIP code 91916 is officially located in the state of California, primarily serving the city of Descanso. It falls under the administrative jurisdiction of San Diego County. When planning mail delivery, logistics routing, or demographic research, 91916 operates within the Pacific Time (PT) timezone and supports the 580 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 91916 ZIP Code Tabulation Area is approximately 29,980. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $112,916.