In April 2009, the West Seattle route was renamed from the Elliott Bay Water Taxi to the King County Water Taxi. Later that year, on September 28, 2009, the Vashon Island/Downtown Seattle route was transferred from Washington State Ferries and became the second King County Water Taxi Route.
In April 2009, the West Seattle route of the water taxi changed its name to the King County Water Taxi. Later that year, on September 28th, the Vashon Island/Downtown Seattle route was transferred from Washington State Ferries and became the second King County Water Taxi Route.