| Election Name: | 1903 Mississippi Democratic Party gubernatorial runoff |
| Type: | presidential |
| Country: | Mississippi |
| Flag Image: | Flag of Mississippi (1894-1996).svg |
| Previous Election: | 1899 Mississippi gubernatorial election |
| Previous Year: | 1899 |
| Next Election: | 1907 Mississippi gubernatorial election |
| Next Year: | 1907 |
| Ongoing: | no |
| Election Date: | August 27, 1903 |
| Image1: | File:James K. Vardaman, half-length portrait, seated LCCN2005687429-cropped2.jpg |
| Nominee1: | James K. Vardaman |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 53,032 |
| Percentage1: | 53.42% |
| Nominee2: | Frank A. Critz |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 46,249 |
| Percentage2: | 46.58% |
| Map Size: | 150px |
| Governor | |
| Before Election: | Andrew H. Longino |
| Before Party: | Democratic Party (United States) |
| After Election: | James K. Vardaman |
| After Party: | Democratic Party (United States) |
The 1903 Mississippi gubernatorial election took place on November 3, 1903, in order to elect the Governor of Mississippi. Incumbent Democrat Andrew H. Longino was term-limited, and could not run for reelection to a second term.
The Democratic primary election was held on August 6, 1903, with the runoff held on August 27, 1903.
In the general election, Democratic candidate James K. Vardaman, a former state senator, ran unopposed.