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| Elections in California |
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The 1964 United States Senate election in California was held on November 3, 1964.
Incumbent Democratic Senator Clair Engle, who had been first elected in 1958, underwent surgery for a brain tumor in August 1963. Facing a primary challenge from Alan Cranston and deteriorating health, he withdrew from the race in April 1964. The primary election was won by Pierre Salinger, Press Secretary to President Lyndon Johnson. When Engle died in July, Salinger was appointed as interim senator in his place.
Salinger lost election to a full six-year term to Republican George Murphy, a retired Hollywood star. This was the only Senate seat Republicans gained in 1964.