Adolphus Frederick, 1st duke of Cambridge (born Feb. 24, 1774, London, Eng.—died July 8, 1850, London) was a British field marshal, the seventh son of King George III.
Having studied at the University of Göttingen, he served in the Hanoverian army and with the British army in the Low Countries, being severely wounded in 1793. He was created Earl of Tipperary and Duke of Cambridge in November 1801 and became a privy councillor in 1802. In 1813 he was promoted field marshal and in 1816, after the electorate of Hanover had been raised to the rank of a kingdom, the duke was appointed viceroy. He held this position until the separation of Great Britain and Hanover in 1837.