Sunnyside is a city in Yakima County, Washington, United States. The population was 16,375 at the 2020 census, making it the second-most populous city in Yakima County.
Fife Heights CDP, Washington (data.census.gov)Fife Heights CDP, Washington is a city, town, place equivalent, or township located in Washington. Fife Heights CDP, Washington has a land area of 1.1 square miles.