ZIP code 97640 is officially located in the state of Oregon, primarily serving the city of Summer lake. It falls under the administrative jurisdiction of Lake County. When planning mail delivery, logistics routing, or demographic research, 97640 operates within the Pacific Time (PT) timezone and supports the 396 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 97640 ZIP Code Tabulation Area is approximately 28,396. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $120,640.