SeaTac or Seatac is a city in southern King County, Washington, United States, and an outlying suburb of Seattle, Washington. The name SeaTac is a combination of the first syllables of Seattle and Tacoma. The city of SeaTac is 10 square miles in area and has a population of 26,909 according to the 2010 census. The city boundaries surround the Seattle–Tacoma International Airport, which is owned and operated by the Port of Seattle.