| Marvin Tandy Culpepper, Sr. | |
| Office: | Louisiana State Representative from Jackson Parish |
| Term Start: | 1964 |
| Term End: | 1968 |
| Preceded: | I. J. Allen |
| Succeeded: | E. L. "Bubba" Henry |
| Birth Date: | 26 November 1908 |
| Birth Place: | Jonesboro, Jackson Parish Louisiana, US |
| Spouse: | Ezelle Fleming Culpepper (married 1938–1970, his death) |
| Children: | Marvin T. Culpepper, Jr. Mark Alan Culpepper Kathy Belle Culpepper John Fleming Culpepper |
| Residence: | Jonesboro, Louisiana |
| Death Place: | Hodge, Jackson Parish |
| Resting Place: | Springhill Cemetery in Jonesboro |
| Party: | Democrat |
| Occupation: | Engineer; farmer |
| Branch: | United States Army |
| Battles: | World War II |
Marvin Tandy Culpepper, Sr. (November 26, 1908 – January 31, 1970), was an engineer, machinist, and farmer from Jackson Parish in North Louisiana, who served from 1964 to 1968 as a Democrat in the Louisiana House of Representatives. His one term in office coincided with the first term of Governor John McKeithen. He was defeated for reelection by his fellow Democrat E. L. "Bubba" Henry, who in his second term in the chamber became the House Speaker.[1]