Jørgen Rantzau (1652–1713) was a Danish Major general who fought several campaigns under John Churchill, 1st Duke of Marlborough.
At the Battle of Oudenaarde in 1708, he commanded the cavalry in the vanguard under British army officer William Cadogan, 1st Earl Cadogan and played an important role in the early stages of the battle.
Just prior to the battle, Reventlow was taken ill and had to yield command to Jørgen Rantzau.
The battle was a decisive Swedish victory and marked the end of any realistic hopes for Denmark to recover the Scanian territories.
Subsequently Rantzau was given command of the blockade corps confronting the Swedish fortifications around the city of Wismar.