The Mukilteo Light at Mukilteo, Washington is an operational lighthouse with non-rotating fresnel lens. It originally had a revolving Fresnel lens until 1927, when it was replaced with a fixed lens. The grounds and interior, inside a city park adjacent to the Washington State Ferries Mukilteo ferry terminal, are open to the public. The Mukilteo Historical Society maintains the lighthouse and the exhibits about the lighthouse and city history in the keeper's house.
The lighthouse went into operation in 1906. The lighthouse and a modern fog signal were automated in 1979, and in 1981, a remote fog sensor was installed. It was placed on the National Register of Historic Places in 1977, and in 1991 the Coast Guard leased the lighthouse to the city of Mukilteo, although navigational equipment is still maintained by the Coast Guard. The lighthouse is one of only a few lighthouses constructed of wood. Mukilteo State Park is an unofficial state park that encompasses the lighthouse at the west end of the city of Mukilteo, Washington and 14.4 acres (0.058 km2) south of it. The property is west and south of the Washington State Ferries terminal with ferry service to Whidbey Island and is crossed by the Burlington Northern Mainline. The island, which is easily visible from the shore, lies across a narrow portion of Possession Sound. This park is now known as Mukilteo Lighthouse Park. The former Washington State Park was deeded to the City in 2003. In 2004, the City adopted a Lighthouse Park Master Plan to make physical improvements to the approximately site. Phase I of the Plan is scheduled to begin in October 2007. Mukilteo State Park has about 1,500 feet (460 m) of sandy beach and includes a public boat launch, lighthouse and dock. This is one of the most easily accessed shorelines in urban Snohomish County.