Sir Carleton Kemp Allen MC QC FRSL FBA (7 September 1887 – 11 December 1966) was an Australian-born professor and Warden of Rhodes House, University of Oxford.

Allen was a captain in the 13th Battalion, Middlesex Regiment, in World War I, was wounded, and was awarded the Military Cross in 1918.

In 1926, he spent a year as Tagore professor at the University of Calcutta and published his lectures from that time as Law in the Making in 1927.

He filled this office with great distinction and he and his wife, Dorothy Frances Allen (1896–1959), whom he had married at Oxford in 1922, won the affection and respect of generations of Rhodes scholars.

He died at Oxford and was survived by his second wife, Hilda, whom he had married in 1962, and by two children of his first marriage, a son and daughter (the writer Rosemary Dinnage).