| Dan Cassidy | |
| Birth Date: | 29 April 1961 |
| Birth Place: | Hollywood, Florida |
| Height: | 5 ft 10 in |
| Plays: | Right-handed |
| Careerprizemoney: | $263,318 |
| Singlesrecord: | 35–74 |
| Singlestitles: | 1 |
| Highestsinglesranking: | No. 74 (18 February, 1985) |
| Australianopenresult: | 3R (1984) |
| Frenchopenresult: | 2R (1985) |
| Wimbledonresult: | 1R (1985) |
| Usopenresult: | 2R (1985) |
| Doublesrecord: | 41–69 |
| Doublestitles: | 0 |
| Highestdoublesranking: | No. 62 (10 November, 1986) |
| Australianopendoublesresult: | 3R (1985, 1990) |
| Frenchopendoublesresult: | 2R (1988) |
| Wimbledondoublesresult: | 1R (1985, 1987) |
| Usopendoublesresult: | 1R (1984, 1985, 1986) |
Dan Cassidy (born April 29, 1961) is a former professional tennis player from the United States. He was born in Hollywood, Florida.
During his career, Cassidy won 1 singles title. He achieved a career-high singles ranking of world No. 74 in 1985 and a career-high doubles ranking of World No. 62 in 1986.