1928 United States Senate election in Washington

The 1928 United States Senate election in Washington was held on November 6, 1928. Incumbent Democrat Clarence Dill was re-elected to a second term in office over Republican Chief justice Kenneth Mackintosh.

As of 2024, this is the last time Washington elected a U.S. Senator from east of the Cascade Mountains.

Candidates

 * Clarence C. Dill, incumbent Senator since 1923
 * James Cleveland Longstreet

Candidates

 * Austin E. Griffiths
 * Kenneth Mackintosh, Chief Justice of the Washington Supreme Court since 1918
 * Miles Poindexter, U.S. Ambassador to Peru and former U.S. Senator (1911–23)