Washington State Route 12 may refer to several highways in the U.S. state of Washington:
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U.S. Route 12 in Washington
U.S. Route 12 (US 12) is a major east-west U.S. Highway, running from Aberdeen, Washington, to Detroit, Michigan. It spans 430.8 miles across the state of Washington (state), Washington, and is the only numbered highway to span the entire stat ...
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State Road 12 (Washington 1923-1937), the Ocean Beach Highway
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Primary State Highway 12 (Washington)
Primary State Highways were major state highways in the U.S. state of Washington used in the early 20th century. They were created as the first organized road numbering system in the state in stages between 1905 and 1937 and used until the 1964 ...
(1937-1970), the Ocean Beach Highway
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State Road 12 (Washington 1905-1919), the Methow-Barron Road
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Washington State Route 12 (1964-1967), now SR 14
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