The 1976 United States Senate election in Hawaii took place on November 2, 1976. Incumbent Republican U.S. Senator Hiram Fong decided to retire, instead of seeking re-election to a fourth term. Democrat Spark Matsunaga won the open seat by defeating Republican William Quinn.
1976 United States Senate election in Hawaii
Matsunaga: 50–60% 60–70%
Both US House representatives Spark Matsunaga from the 1st district and Patsy Mink from the 2nd district ran in the Democratic primary, which Matsunaga won.