ZIP code 95521 is officially located in the state of California, primarily serving the city of Mc kinleyville. It falls under the administrative jurisdiction of Humboldt County. When planning mail delivery, logistics routing, or demographic research, 95521 operates within the Pacific Time (PT) timezone and supports the 221 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 95521 ZIP Code Tabulation Area is approximately 42,921. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $97,521.