| Clark Swisher | |
| Birth Date: | 27 March 1916 |
| Birth Place: | Vermillion, South Dakota, U.S. |
| Death Place: | Wessington Springs, South Dakota, U.S. |
| Player Sport1: | Football |
| Player Years2: | 1934–1937 |
| Player Team2: | South Dakota |
| Player Sport3: | Basketball |
| Player Years4: | 1934–1938 |
| Player Team4: | South Dakota |
| Coach Sport1: | Football |
| Coach Years2: | 1938 |
| Coach Team2: | Wagner HS (SD) |
| Coach Years3: | 1939–1940 |
| Coach Team3: | Elk Point HS (SD) |
| Coach Years4: | 1946–1955 |
| Coach Team4: | Northern State |
| Coach Years5: | 1957–1968 |
| Coach Team5: | Northern State |
| Coach Sport6: | Basketball |
| Coach Years7: | 1946–1955 |
| Coach Team7: | Northern State |
| Overall Record: | 146–42–4 (college football) 95–88 (college basketball) |
| Bowl Record: | 1–0 |
| Tournament Record: | Football 0–3 (NAIA playoffs) |
| Championships: | Football 15 SDIC (1948, 1950, 1952–1955, 1957, 1960–1963, 1965–1968) |
Clark Leo Swisher (March 27, 1916 – November 28, 2005) was an American football and basketball coach. He served as the head football coach at Northern State University in Aberdeen, South Dakota from 1946 and 1955 and from 1957 to 1968, compiling a record of 146–42–4.[1] Swisher was also the head basketball coach at Northern State from 1946 to 1955, tallying a mark of 95–88.[2] Swisher died on November 28, 2005, at a hospital in Wessington Springs, South Dakota.[3]