John Ponsonby may refer to:
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John Ponsonby (politician) (1713–1789), Irish politician
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John Ponsonby, 1st Viscount Ponsonby (c. 1772 – 1855), British diplomat
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John Ponsonby, 4th Earl of Bessborough (1781–1847), English politician
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John Ponsonby, 5th Earl of Bessborough (1809–1880), British politician
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John Ponsonby (British Army officer) (1866–1952), British general
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John Ponsonby (RAF officer) (1955-2022), senior commander in the Royal Air Force
{{hndis, Ponsonby, John