The U.S. state of Washington is home to a number of public and private ferry systems, most notably the state-run Washington State Ferries.
Due to Washington's geography which features large, deep bodies of water with many peninsulas and islands, ferries are a convenient means of connecting communities in the region. Most were operated by private companies until later acquisitions by governments, beginning with the state's takeover of the Keller Ferry on the Columbia River in 1930.
The Washington State Ferries system was created in 1951 from the state government's acquisition of a private firm. It operates large automobile ferries on Puget Sound and in the San Juan Islands. The agency also operated passenger ferries from 1986 to 2006, but was later prohibited from operating passenger-only routes. Other local operators, including the King County Water Taxi and Kitsap Fast Ferries, emerged in the 21st century to operate passenger-only routes. Several county governments operate their own ferry routes, with Kitsap Transit specifically authorized by the state legislature to run passenger ferries. An expansion of this authority was proposed by a legislator in 2025. The use of high-speed electric hydrofoils is under study for several systems in the Puget Sound regions.
Washington State Ferries, owned and operated by the Washington State Department of Transportation (WSDOT), serves communities on Puget Sound and in the San Juan Islands. It is the largest fleet of passenger and automobile ferries in the United States and the third largest in the world.
Many private ferries exist to serve residents of islands throughout Puget Sound and beyond into the Strait of Juan de Fuca. For example: