| Rex Darling | |
| Birth Date: | 2 October 1914 |
| Birth Place: | Lincoln, Kansas, U.S. |
| Death Place: | Charleston, Illinois, U.S. |
| Coach Sport1: | Football |
| Coach Years2: | 1945–1950 |
| Coach Team2: | Eastern Illinois (assistant) |
| Coach Years3: | 1951 |
| Coach Team3: | Eastern Illinois |
| Coach Sport4: | Basketball |
| Coach Years5: | 1945–1964 |
| Coach Team5: | Eastern Illinois (assistant) |
| Coach Years6: | 1964–1967 |
| Coach Team6: | Eastern Illinois |
| Coach Sport7: | Tennis |
| Coach Years8: | 1946–1974 |
| Coach Team8: | Eastern Illinois |
| Overall Record: | 4–2–2 (football) 42–55 (basketball) |
Rex V. Darling (October 2, 1914 – October 14, 1996) was an American football, basketball, and tennis coach. He was the 12th head football coach at Eastern Illinois State College—now known as Eastern Illinois University—in Charleston, Illinois, serving for one season, in 1951, and compiling a record of 4–2–2.[1] [2] Darling was also the head basketball coach at Eastern Illinois from 1964 to 1967, tallying a mark of 42–55. He was the school's head tennis coach from 1946 to 1974.