Oliver De Lancey may refer to:
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Oliver De Lancey (American loyalist) (1718–1785), merchant, New York Loyalist politician and Major-general during the American War of Independence
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Oliver De Lancey (British Army officer, died 1822) (c. 1749–1822), British Army officer who took part in the American War of Independence and the French Revolutionary Wars
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Oliver De Lancey (British Army and Spanish Legion officer) (1803–1837), British Army officer, volunteered for Spanish Legion and died fighting in Spain during the First Carlist War
{{hndis, Delancey, Oliver