Mukilteo

The current site of downtown Mukilteo (also named Old Town) has been inhabited by the Snohomish people for at least 1,000 years before present. The Treaty of Point Elliott was signed in Mukilteo in 1855, opening the region to American settlement. A new town was founded at Mukilteo and served as the provisional county seat of Snohomish County in early 1861. The area remained a trading post for loggers and was home to other industries, but was overshadowed by Everett and grew slowly.

Mukilteo was used during World War II as an auxiliary fueling facility, due to its proximity to the newly built Snohomish County Airport (now Paine Field). Mukilteo was incorporated as a city in 1947 and saw new suburban development, which accelerated after the opening of the nearby Boeing Everett Factory in the late 1960s. The city annexed large suburban areas on the west side of Paine Field in the 1980s and 1990s, including Harbour Pointe and the State Route 525 corridor, while also revitalizing the Old Town area in the 2000s.