Fairwood is an unincorporated community and census-designated place (CDP) in King County, Washington, United States. The population of the CDP was 19,102 at the 2010 census. The population of the King County Incorportion area of Fairwood is 25,000 as of 2007.
Fairwood has a variety of single-family housing developments, and some multi-family dwellings interspersed with rural and undeveloped areas. The area includes two distinct business areas serving the local population. The area surrounding the Fairwood library has the most developed businesses (retail, personal and professional services), generally located in major shopping centers anchored by chain grocery stores. The CDP was formerly known as Cascade-Fairwood until the Cascade area was annexed to the city of Renton in 2008.