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.
Contents |
| No. | Date | Tournament | Surface | Opponent in the final | Score |
| 1. | 1984 | Melbourne Outdoor, Australia | Grass | John Fitzgerald | 7–6, 7–6 |
| No. | Date | Tournament | Surface | Partnering | Opponent in the final | Score |
| 1. | 1986 | Boston, U.S. | Clay | Mel Purcell | Hans Gildemeister Andrés Gómez |
6–4, 5–7, 0–6 |