Christian Rantzau (23 January 1684 – 16 April 1771) was a Danish nobleman and civil servant.

He owned besides Rosenvold, estates at Asdal, Brahesborg, Hammelmose, Krengerup and Skovgaard.

In 1726, he received a seat on the commission to investigate the conditions of the Danish-Norwegian Royal Navy.

He lived at St. Canute's Abbey (Skt Knuds Kloster) among the largest buildings in Odense.

Unfortunately he became insane in his last years, and destroyed a lot of the collection, including old monastic books from the Middle Ages.