Mukilteo (/ˌmʌkəlˈtiːoʊ/ US dict: mŭk′·əl·tē′·ō), which means "good camping ground," is a city in Snohomish County, Washington, United States. The population was 20,254 at the 2010 census. It is on the shore of the Puget Sound, and is the site of a Washington State Ferries terminal linking it to Clinton, on Whidbey Island.Mukilteo is one of the most affluent suburbs of Seattle. In 2007, the city had a median income of $83,569.