St Andrew St John may refer to:
- St Andrew St John, 14th Baron St John of Bletso (1759–1817), English politician
- St Andrew St John, 15th Baron St John of Bletso (1811–1874), English peer
- St Andrew St John, 16th Baron St John of Bletso (1840–1887), English peer
- St Andrew St John (priest) (1732–1795), Dean of Worcester
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