List of numbered highways in Washington

Part of the series on Highways in Washington
	Interstates
	U.S. routes
	State highways

The Washington State Department of Transportation (WSDOT) is responsible for the establishment and classification of a system of state-maintained highways in the U.S. state of Washington, which includes interstate highways, U.S. highways, and state highways.

Lists of routes

	Interstate Highways: A list of interstate highways within Washington.
	U.S. Routes: A list of U.S. highways within Washington.
	State highways: A list of state highways within Washington.

National systems

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State highways	Alabama • Alaska • Arizona • Arkansas • California • Colorado • Connecticut • Delaware • Florida • Georgia • Hawaii • Idaho • Illinois • Indiana • Iowa • Kansas • Kentucky • Louisiana • Maine • Maryland • Massachusetts • Michigan • Minnesota • Mississippi • Missouri • Montana • Nebraska • Nevada • New Hampshire • New Jersey • New Mexico • New York • North Carolina • North Dakota • Ohio • Oklahoma • Oregon • Pennsylvania • Rhode Island • South Carolina • South Dakota • Tennessee • Texas • Utah • Vermont • Virginia • Washington • West Virginia • Wisconsin • Wyoming
Other areas	District of Columbia • American Samoa • Guam • Puerto Rico • Virgin Islands

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