| Election Name: | 1976 United States Senate election in Arizona |
| Country: | Arizona |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1970 United States Senate election in Arizona |
| Previous Year: | 1970 |
| Next Election: | 1982 United States Senate election in Arizona |
| Next Year: | 1982 |
| Election Date: | November 2, 1976 |
| Image1: | File:Sen. Dennis DeConcini.jpg |
| Nominee1: | Dennis DeConcini |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 400,334 |
| Percentage1: | 54.01% |
| Nominee2: | Sam Steiger |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 321,236 |
| Percentage2: | 43.34% |
| Map Size: | 210px |
| U.S. Senator | |
| Before Election: | Paul Fannin |
| Before Party: | Republican Party (United States) |
| After Election: | Dennis DeConcini |
| After Party: | Democratic Party (United States) |
The 1976 United States Senate election in Arizona took place on November 2, 1976. Incumbent Republican senator Paul Fannin decided to retire instead of seeking a third term. Democrat Dennis DeConcini won the open seat even as incumbent Republican President Gerald Ford won the state for election on the same ballot.