| Stewart Clark | |
| Birth Date: | 12 April 1890 |
| Birth Place: | Carthage, Illinois, U.S. |
| Death Place: | Illinois, U.S. |
| Alma Mater: | William & Vashti College |
| Coach Sport1: | Football |
| Coach Years2: | 1915–1919 |
| Coach Team2: | Carthage |
| Coach Years3: | 1928–1929 |
| Coach Team3: | Western State (CO) |
| Coach Sport4: | Basketball |
| Coach Years5: | 1924–1928 |
| Coach Team5: | Wyoming |
| Overall Record: | 10–19 (football) 43–24 (basketball) |
Stewart McCullough Clark (April 12, 1890 – 1974) was an American football and basketball coach. He served as the head football coach at Carthage College in Carthage, Illinois from 1915 to 1919 and at Western State College of Colorado—now known as Western Colorado University—from 1928 to 1929, compiling a career college football coaching record of 10–19. Clark was also the head basketball coach at the University of Wyoming from 1924 to 1928, tallying a mark of 43–24. He was a brother of Potsy Clark.
Clark was the head football coach at Carthage College in his hometown of Carthage, Illinois (since relocated to Kenosha, Wisconsin), serving for five seasons, from 1915 to 1919, and compiling a record of 8–7.[1] [2]