George III (1738–1820) was King of Great Britain and Ireland from 1760 to 1820.

George III may also refer to:

• George III of Georgia (died 1183)
• George III, Landgrave of Leuchtenberg (1502–1555)
• George III, Prince of Anhalt-Dessau (1507–1553)
• George III, Count of Erbach-Breuberg (1548–1605)
• George III of Imereti (1605–1639)
• George III of Brieg (1611–1664)
• George III, Landgrave of Hesse-Itter (1632–1676)
• George III of Guria (died 1684)

• George III (ship), a British convict ship wrecked in 1835
• GEORGE 3, a computer operating system from ICL

• King George (disambiguation)

This disambiguation page lists articles associated with the title George III.
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