| Biographical details | |
|---|---|
| Born | August 3, 1875 Brooklyn, New York |
| Died | January 8, 1909 |
| Playing career | |
| 1892 | Brooklyn Poly |
| 1897–1901 | Johns Hopkins |
| Coaching career (HC unless noted) | |
| 1897–1901 | Johns Hopkins |
| Head coaching record | |
| Overall | 25–6 |
| Accomplishments and honors | |
| Championships | |
| |
William Harvey Maddren (August 3, 1875 – January 8, 1909) was an American lacrosse coach and physician. He served as the fourth head coach of the Johns Hopkins University lacrosse team from 1897 to 1901 during which time his teams compiled a 25–6 record and captured three national championships.