| Thad Vann | |
| Birth Date: | 22 September 1907 |
| Birth Place: | Magnolia, Mississippi, U.S. |
| Death Place: | Jackson, Mississippi, U.S. |
| Player Sport1: | Football |
| Player Years2: | 1926–1928 |
| Player Team2: | Ole Miss |
| Player Positions: | Tackle |
| Coach Sport1: | Football |
| Coach Years2: | 1937–1948 |
| Coach Team2: | Mississippi Southern (assistant) |
| Coach Years3: | 1949–1968 |
| Coach Team3: | Mississippi Southern / Southern Miss |
| Coach Sport4: | Baseball |
| Coach Years5: | 1948–1949 |
| Coach Team5: | Mississippi Southern |
| Overall Record: | 139–59–2 (football) 21–21 (baseball) |
| Bowl Record: | 0–4 |
| Championships: | Football 2 UPI small college (1958, 1962) 2 Gulf States (1950–1951) |
| Awards: | Mississippi Sports Hall of Fame (1971) Ole Miss Sports Hall of Fame (1987) |
| Cfbhof Year: | 1987 |
| Cfbhof Id: | 1767 |
Thad "Pie" Vann (September 22, 1907 – September 7, 1982) was an American football and baseball coach. He served as the head football coach at the University of Southern Mississippi—known as Mississippi Southern College prior to 1962—from 1949 to 1968. During his tenure, he compiled a 139–59–2 record and helped transform Mississippi Southern into one of the nation's elite programs. His only losing season came in 1968, after 19 consecutive winning seasons. His 1953 team went 9–2, including a major upset against Alabama. His 1954 team went 6–4 and upset Alabama once again. He was also the head baseball coach at Mississippi Southern from 1948 to 1949, tallying a mark of 21–21. Van died on September 7, 1982, at Veterans Administration Hospital in Jackson, Mississippi, following long illness.[1] He was inducted into the College Football Hall of Fame in 1987.