SeaTac /ˈsiːtæk/ is a city in southern King County, Washington, United States. It is a suburb of Seattle, Washington. The name SeaTac is a combination of Seattle and Tacoma. It is named from the Seattle–Tacoma International Airport.
The city of SeaTac is 10 square miles (26 km2) in area and has a population of 26,909 according to the 2010 census. Residents voted for incorporation on March 14, 1989, and the city incorporated in February 1990.