Washington State Route 12 may refer to several highways in the U.S. state of Washington:
- U.S. Route 12 in Washington
- State Road 12 (Washington 1923-1937), the Ocean Beach Highway
- Primary State Highway 12 (Washington) (1937-1970), the Ocean Beach Highway
- State Road 12 (Washington 1905-1919), the Methow-Barron Road
- Washington State Route 12 (1964-1967), now SR 14
This disambiguation page lists articles associated with the title Washington State Route 12.
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