Oliver De Lancey

• Oliver De Lancey (American loyalist), merchant, New York Loyalist politician and major-general during the American War of Independence
• Oliver De Lancey (British Army officer, died 1822), British Army officer who took part in the American War of Independence and the French Revolutionary Wars
• Oliver De Lancey (British Army and Auxiliary Legion officer), British Army officer, volunteered for Spanish Legion and died fighting in Spain during the First Carlist War