Below is a list of Walla Walla County WA zip codes. For your research we have also included Walla Walla County Area Code, Time Zone, UTC and the local County FIPS Code. Each Walla Walla County Washington zip code has a center Longitude / Latitude point (the Walla Walla County center is -118.49500274658 / 46.145900726318). For your convenience we have also indicated if that zip code in Walla Walla County observes Daylight Savings time.