Theaker is a surname. Notable people with this name include:
Cam Theaker (1912–1992), English footballer Deborah Theaker (born 1964), Canadian actress Harry Theaker (1873–1954), English painter, illustrator Hugh A. Theaker (1842–1903), American colonel Raer Theaker (born 1997), Welsh gymnast Thomas Clarke Theaker (1812–1883), American politician Theaker Wilder (1717–1778), Irish professor