| Election Name: | 1976 United States Senate election in Hawaii |
| Country: | Hawaii |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1970 United States Senate election in Hawaii |
| Previous Year: | 1970 |
| Next Election: | 1982 United States Senate election in Hawaii |
| Next Year: | 1982 |
| Election Date: | November 2, 1976 |
| Image1: | Spark Matsunaga 1972 (cropped).png |
| Nominee1: | Spark Matsunaga |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 162,305 |
| Percentage1: | 53.73% |
| Nominee2: | William Quinn |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 122,724 |
| Percentage2: | 40.62% |
| Map Size: | 300px |
| U.S. Senator | |
| Before Election: | Hiram Fong |
| Before Party: | Republican Party (United States) |
| After Election: | Spark Matsunaga |
| After Party: | Democratic Party (United States) |
The 1976 United States Senate election in Hawaii took place on November 2, 1976. Incumbent Republican U.S. Senator Hiram Fong did not seek re-election to a fourth term. Democrat Spark Matsunaga won the open seat by defeating Republican William Quinn.
Primary elections were held on October 2.[1] Former Governor William F. Quinn easily won the Republican nomination with 93 percent of the vote. In the Democratic primary, Spark Matsunaga won with 51 percent of the vote. His closest competitor was his House colleague Patsy Mink, who received 41 percent.[1]