| Age | 87 (age at death) |
| Birthday | 22 February, 1857 |
| Birthplace | Mount Vernon, New York |
| Died | 1 January, 1945 |
| Zodiac Sign | Pisces |
| Nationality | American |
| Occupation | Educator |
William Trelease (February 22, 1857 – January 1, 1945) was an American botanist, entomologist, explorer, writer and educator. This botanist is denoted by the author abbreviation Trel. when citing a botanical name.
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