Carnation is a city in King County, Washington, United States. The population was 1,786 at the 2010 census.
Settled in 1865, Carnation was officially incorporated on December 30, 1912, as Tolt. The name was changed to Carnation in 1917, back to Tolt on May 3, 1928, and finally back to Carnation again on October 29, 1951. The name Carnation was chosen to honor a nearby research farm operated by theCarnation Milk Products Company.