Marquess of Willingdon was a title in the Peerage of the United Kingdom.

It was created on 26 May 1936 for the Liberal politician and colonial governor Freeman Freeman-Thomas, 1st Earl of Willingdon.

[5] (Ratendone was the Domesday Book spelling of the Freeman-Thomas's ancestral home in Ratton, Sussex.

Upon his death in 1941, the 1st Marquess of Willingdon was succeeded by his only surviving son, Inigo.

Inigo was a soldier and also served as Liberal Chief Whip in the House of Lords from 1948 to 1949.