| Election Name: | 1978 United States Senate special election in Alabama |
| Country: | Alabama |
| Type: | presidential |
| Ongoing: | no |
| Election Date: | November 7, 1978 |
| Previous Election: | 1974 United States Senate election in Alabama |
| Previous Year: | 1974 |
| Next Election: | 1980 United States Senate election in Alabama |
| Next Year: | 1980 |
| Image1: | Donald_W._Stewart.png |
| Nominee1: | Donald W. Stewart |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 401,852 |
| Percentage1: | 54.93% |
| Nominee2: | James D. Martin |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 316,170 |
| Percentage2: | 43.22% |
| Map Size: | 250px |
| U.S. Senator | |
| Before Election: | Maryon Pittman Allen |
| Before Party: | Democratic Party (US) |
| After Election: | Donald W. Stewart |
| After Party: | Democratic Party (US) |
The 1978 United States Senate special election in Alabama was held on November 7, 1978. It was a special election to fill the seat which had been held by Senator Jim Allen, who died on June 1. His widow Maryon was appointed on June 8 by governor George Wallace to fill the vacancy until a special election could be held.
Democratic state senator Donald W. Stewart defeated Allen in the Democratic primary then defeated former Republican Congressman James D. Martin to serve the remaining two years of the term.
Primary elections were held on September 5, 1978, with the Democratic runoff held on September 26, 1978.
Nichols withdrew from the race in order that James D. Martin, former U.S. Representative for Alabama's 7th congressional district, who had been nominated to run in the concurrent regular Senate election, could switch races.[5]