William Dunbar (c. 1460 – c. 1520) was a Scottish poet.

William Dunbar may also refer to:

• Sir William Dunbar, 7th Baronet (1812–1889), Scottish Liberal Member of Parliament in the British House of Commons
• William Dunbar (Code Lyoko), a character in the animated television series Code Lyoko
• William Dunbar (explorer) (1750–1810), Scottish and American naturalist, astronomer, explorer
• William Dunbar (politician) (1805–1861), U.S. Representative from Louisiana
• William Dunbar (songwriter) (1852/53–1874), prolific Gateshead songwriter
• William C. Dunbar (1822–1905), Scottish Mormon missionary and Mormon pioneer
• William P. Dunbar (1863–1922), American physician who made seminal discoveries about cholera control
• William Dunbar (bishop) (1661–1746),Scottish Episcopal clergyman
• William F. Dunbar (1820–?), American politician

• William Dunbar Holder (1824–1900), Confederate politician
• William Dunbar House, Boise, Idaho, NRHP listing

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