Sidney Montagu may refer to:

• Sidney Montagu (MP, died 1644), English member of parliament (MP)
• Sidney Wortley Montagu (1650–1727), British coal-owner and MP
• Sidney Montagu, 11th Duke of Manchester (1929–1985), British hereditary peer

• Sydney Montagu Samuel (1848–1884), English journalist, librettist, financier, and communal worker

This disambiguation page lists articles about people with the same name.
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