Below is a list of Zillah WA zip codes. For your research we have also included Zillah Area Code, Time Zone, UTC and the local Yakima County FIPS Code. Each Zillah Washington zip code has a center Longitude / Latitude point (the Zillah center is -120.26499938965 / 46.402900695801). For your convenience we have also indicated if that zip code in Zillah observes Daylight Savings time.