| George Cassidy | |
| Birth Date: | c. 1880s |
| Birth Place: | Poultney, Vermont, U.S. |
| Alma Mater: | University of Vermont (1910) |
| Player Sport1: | Football |
| Player Years2: | c. 1909 |
| Player Team2: | Vermont |
| Player Positions: | Guard |
| Coach Sport1: | Football |
| Coach Years2: | 1910 |
| Coach Team2: | Colorado Agricultural |
| Coach Sport3: | Basketball |
| Coach Years4: | 1910–1911 |
| Coach Team4: | Colorado Agricultural |
| Admin Years1: | 1910–1911 |
| Admin Team1: | Colorado Agricultural |
| Overall Record: | 0–5 (football) 5–4 (basketball) |
George Michael Cassidy was an American football and basketball coach and college athletics administrator. He served as the head football coach at Colorado Agricultural College—now known as Colorado State University—for one season, in 1910, compiling a record of 0–5. Cassidy was also the head basketball coach at Colorado Agricultural for the 1910–11 season, tallying a mark of 5–4. A native of Poultney, Vermont, Cassidy attended the University of Vermont and played on the football and baseball teams there.[1]