William Plant may refer to:
- William Plant (racewalker) (1892–1969), American racewalker that competed in the 1920 Summer Olympics
- William J. Plant (1847–1905), Irish-American politician in New York
- William Plant (sailor) (1944–2018), Jamaican sailor that competed in the 1968 Olympics
See also
- Bill Plante (William Madden Plante, 1938–2022), American journalist
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