| Election Name: | 1947 United States Senate special election in Mississippi |
| Country: | Mississippi |
| Flag Image: | Flag of Mississippi (1894-1996).svg |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1946 United States Senate election in Mississippi |
| Previous Year: | 1946 |
| Next Election: | 1952 United States Senate election in Mississippi |
| Next Year: | 1952 |
| Election Date: | November 4, 1947 |
| Image1: | File:John Stennis.jpg |
| Nominee1: | John C. Stennis |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 52,068 |
| Percentage1: | 26.88% |
| Nominee2: | William M. Colmer |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 45,725 |
| Percentage2: | 23.61% |
| Image3: | 3x4.svg |
| Nominee3: | Forrest B. Jackson |
| Party3: | Democratic Party (United States) |
| Popular Vote3: | 43,642 |
| Percentage3: | 22.53% |
| Image4: | File:Paul B. Johnson Jr.jpg |
| Nominee4: | Paul B. Johnson Jr. |
| Party4: | Democratic Party (United States) |
| Popular Vote4: | 27,159 |
| Percentage4: | 14.02% |
| Image5: | File:JohnERankin.jpg |
| Nominee5: | John E. Rankin |
| Party5: | Democratic Party (United States) |
| Popular Vote5: | 24,492 |
| Percentage5: | 12.64% |
| Map Size: | 249px |
| U.S. Senator | |
| Before Election: | Theodore G. Bilbo |
| Before Party: | Democratic Party (United States) |
| After Election: | John C. Stennis |
| After Party: | Democratic Party (United States) |
The 1947 United States Senate special election in Mississippi was held on November 4, 1947. John C. Stennis was elected to fill the seat vacated by the death of Theodore G. Bilbo.
This is the most recent open seat won by a Democrat in Mississippi, as Stennis and his fellow senator James Eastland would continue to be reelected until both being succeeded by Republicans.