| Election Name: | 1966 United States Senate election in Alabama |
| Country: | Alabama |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1960 United States Senate election in Alabama |
| Previous Year: | 1960 |
| Next Election: | 1972 United States Senate election in Alabama |
| Next Year: | 1972 |
| Election Date: | November 8, 1966 |
| Image1: | John J. Sparkman.jpg |
| Nominee1: | John Sparkman |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 482,138 |
| Percentage1: | 60.07% |
| Nominee2: | John Grenier |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 313,018 |
| Percentage2: | 39.00% |
| Map Size: | 250px |
| U.S. Senator | |
| Before Election: | John Sparkman |
| Before Party: | Democratic Party (US) |
| After Election: | John Sparkman |
| After Party: | Democratic Party (US) |
The 1966 United States Senate election in Alabama was held on November 8, 1966. Incumbent Senator John Sparkman was re-elected to a fourth full term in office over Republican John Grenier.
This was the first Alabama election since Reconstruction to be regulated by federal elections observers, who were sent by the Department of Justice to ensure compliance with the Voting Rights Act.[1]