Zillah is a city in Yakima County, Washington, United States, with a population of 3,179 as of the 2020 census. Zillah was founded in 1891 following the completion of the Sunnyside Canal project, an irrigation scheme delivering water from the Yakima River to the arid lower Yakima Valley.
Today, Zillah is a small agricultural city in Washington's Yakima Valley, known for its vineyards, orchards, and quirky character, including the historic Teapot Dome Service Station. Situated in Yakima County, it's a fertile region for hops, apples, and wine, with numerous local wineries and vineyards.