| Orin A. Kates | |
| Birth Date: | 18 November 1883 |
| Birth Place: | Ord, Nebraska, U.S. |
| Death Place: | Alma, Michigan, U.S. |
| Coach Sport1: | Football |
| Coach Years2: | 1903–1904 |
| Coach Team2: | Arizona |
| Coach Sport3: | Basketball |
| Coach Years4: | 1904–1906 |
| Coach Team4: | Arizona |
| Admin Years1: | 1904–1912 |
| Admin Team1: | Arizona |
| Overall Record: | 5–1–2 (football) 1–0–1 (basketball) |
Orin Albert Kates (November 18, 1883 – January 31, 1947)[1] [2] [3] was an American football and basketball coach and college athletics administrator. He served as the fourth head football coach at the University of Arizona, coaching one season in 1904 and compiling a record of 3–1–2. Kates was also the first head basketball coach at Arizona, coaching two seasons from 1904 to 1906 and tallying a mark of 1–0–1. In addition he served as the school's first athletic director, from 1904 to 1912.