John Cade (1912–1980) was an Australian psychiatrist.
John Cade may also refer to:
- Jack Cade (1420–1450), leader of the Kent Rebellion
- John Cade (MP) (fl. 1571) for Knaresborough (UK Parliament constituency)
- John Cade (antiquarian) (1734–1806), English tradesman and writer on Roman remains
- John Cade (jockey) (1751–1826), St. Leger winning British jockey
- Jack Cade (scout) (fl. 1861), scout in the Federal army in Western Virginia
- John H. Cade, Jr. (1928–1988), Louisiana Republican state chairman
- John A. Cade (1929–1996), Maryland State Senator
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