| Election Name: | 1966 United States Senate election in Alaska |
| Country: | Alaska |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1960 United States Senate election in Alaska |
| Previous Year: | 1960 |
| Next Election: | 1970 United States Senate special election in Alaska |
| Next Year: | 1970 (special) |
| Election Date: | November 8, 1966 |
| Image1: | Bob Bartlett 1967.jpg |
| Nominee1: | Bob Bartlett |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 49,289 |
| Percentage1: | 75.54% |
| Nominee2: | Lee McKinley |
| Party2: | Republican Party (US) |
| Popular Vote2: | 15,961 |
| Percentage2: | 24.46% |
| Map Size: | 400px |
| U.S. Senator | |
| Before Election: | Bob Bartlett |
| Before Party: | Democratic Party (US) |
| After Election: | Bob Bartlett |
| After Party: | Democratic Party (US) |
The 1966 United States Senate election in Alaska was held on November 8, 1966. Incumbent Democratic U.S. Senator Bob Bartlett was re-elected to a third term in office in a landslide, defeating Republican dentist Lee McKinley in a rematch of their 1960 race. Bartlett would not complete the term, dying in office on December 11, 1968, following complications after heart surgery. Ted Stevens would be elected to complete Bartlett's term, and would serve for 40 years in the U.S. Senate. This was the last time until 2008 that a Democrat was elected to Alaska's Class 2 Senate seat.