William Averell (1556–1605) was an English pamphleteer.

William Averell may also refer to:

• William D. Averell (1853–1928), conchologist and editor of The Nautilus
• William W. Averell (1832–1900), Union general in the American Civil War

• William Averell Harriman (1891–1986), American politician, businessman, and diplomat

This disambiguation page lists articles about people with the same name.
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