John Churchill, 1st Duke of Marlborough, English general and politician, Lord Lieutenant of Oxfordshire (died 1722)

General John Churchill, 1st Duke of Marlborough, 1st Prince of Mindelheim, 1st Count of Nellenburg, Prince of the Holy Roman Empire, was a British army officer and statesman. From a gentry family, he served as a page at the court of the House of Stuart under James, Duke of York, through the 1670s and early 1680s, earning military and political advancement through his courage and diplomatic skill. He is known for never having lost a battle.

This is a list of people who have served as Lord Lieutenant of Oxfordshire. Since 1689, all Lords Lieutenant have also been Custos Rotulorum of Oxfordshire.