| Election Name: | 1980 United States Senate election in Connecticut |
| Country: | Connecticut |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1974 United States Senate election in Connecticut |
| Previous Year: | 1974 |
| Next Election: | 1986 United States Senate election in Connecticut |
| Next Year: | 1986 |
| Election Date: | November 4, 1980 |
| Image1: | Rep Chris Dodd.jpg |
| Nominee1: | Chris Dodd |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 763,969 |
| Percentage1: | 56.34% |
| Nominee2: | James Buckley |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 581,884 |
| Percentage2: | 42.91% |
| U.S. Senator | |
| Before Election: | Abraham Ribicoff |
| Before Party: | Democratic Party (United States) |
| After Election: | Chris Dodd |
| After Party: | Democratic Party (United States) |
The 1980 United States Senate election in Connecticut took place on November 4, 1980, alongside other elections to the United States Senate and United States House of Representatives. Incumbent Democratic U.S. Senator Abraham Ribicoff decided to retire. The open seat was won by Democratic Representative Chris Dodd, son of former Senator Thomas J. Dodd.