William F. Allen is the name of:

• William Fessenden Allen (1831–1906), American businessman and politician in the Kingdom of Hawaii and Republic of Hawaii
• William F. Allen (New York) (1808–1878), American lawyer and politician
• William F. Allen (Delaware) (1883-1946), American businessman and politician
• William Francis Allen (1830-1889), American classical scholar
• William F. Allen (engineer), former CEO of Stone & Webster

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