| Birth Date: | 2 February 1932 |
| Office: | President pro tempore of the Mississippi State Senate |
| Term Start: | January 1971 |
| Term End: | January 1972 |
| State Senate1: | Mississippi State |
| Termstart1: | January 1960 |
| Termend1: | January 1972 |
| District1: | 30th |
| Birth Place: | Natchez, Mississippi |
| Predecessor: | Merle Palmer |
| Successor: | B. G. Perry |
William Marion Smith (born February 2, 1932) is a former Mississippi politician who served as a Democrat in the Mississippi Senate between 1960–1972.[1] [2] [3] [4] From 1971 to 1972, Smith was the President pro Tempore of the Mississippi State Senate. He also served at one point as interim Governor.[5]
He was an attorney who taught at the University of Mississippi School of Law. He has served as president of the Ole Miss Alumni Association, the Inter-Alumni Council of Institutions of Higher Learning and the Mississippi Historical Society, among other organizations.
William Marion Smith was born on February 2, 1932, in Natchez, Mississippi. He graduated from Natchez High School, and received B.A. and J.D. degrees from the University of Mississippi.