Selah is a city in Yakima County, Washington, United States. The population was 7,147 at the 2010 census.
Selah was officially incorporated on April 3, 1919. The government is a Strong Mayor/Council form. The Tree Top apple processor co-operative (established in 1960) has its headquarters and two processing plants in Selah. Also in 2004 the Yakama Tribe bought the old Hi-Country juicing plant and currently produces store brand apple juice and other beverages. In addition a number of fruit companies have warehouses there, due to the proximity of fruit orchards in the nearby Wenas Valley and access to regional railroad and roadway systems for shipment to markets. Selah and the Wenas Valley increasingly serve as a "bedroom community" of the larger city of Yakima to the south. Because of the nearby orchards and juice processing plants, Selah is often referred to as "The Apple Juice Capital of the World"
The Washington State Audubon Society each Memorial Day weekend holds a campout some 22 miles north of Selah at the Hazel Wolf Bird Sanctuary in the upper Wenas Valley. The upper valley also holds Wenas Lake, an irrigation reservoir famed among anglers. Wenas Creek flows from the reservoir through the agricultural lower Wenas Valley. This is where the Wenas Creek Mammoth was found. The creek is a tributary of the Yakima River.