ZIP code 99587 is officially located in the state of Alaska, primarily serving the city of Girdwood. It falls under the administrative jurisdiction of Anchorage Borough County. When planning mail delivery, logistics routing, or demographic research, 99587 operates within the Pacific Time (PT) timezone and supports the 377 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 99587 ZIP Code Tabulation Area is approximately 18,577. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $119,587.