Below is a list of Underwood WA zip codes. For your research we have also included Underwood Area Code, Time Zone, UTC and the local Skamania County FIPS Code. Each Underwood Washington zip code has a center Longitude / Latitude point (the Underwood center is -121.52500152588 / 45.729301452637). For your convenience we have also indicated if that zip code in Underwood observes Daylight Savings time.