Arthur James Mason DD (4 May 1851 – 24 April 1928) was an English clergyman, theologian and classical scholar. He was Lady Margaret's Professor of Divinity, Master of Pembroke College, Cambridge, and Vice-Chancellor of the University of Cambridge.
The third son of George William Mason JP, of Morton Hall, Retford, Nottinghamshire, by his marriage to Marianne Atherton Mitford (born 1821 in India), a daughter of Captain Joseph George Mitford (1791–1875), of the Madras Army, Mason was educated at Repton School and Trinity College, Cambridge. The third of four sons, his youngest brother, Charles Evelyn Mason, was killed in the Zulu War of 1879. His brother William Henry Mason was a High Sheriff of Nottinghamshire. His sister, Harriet, was a poor law inspector and another sister, Agnes founded a religious community. Their grandfather, J. G. Mitford, was the son of Bertram Mitford (1748–1800) of Mitford Castle in Northumberland.
Mason was elected a Fellow of Trinity College in 1873 and was a college tutor from 1874 to 1877, when he went to Cornwall as Canon of Truro. His departure from Cambridge was at the urging of his friend Edward Benson, who had been appointed as Bishop of Truro and wanted Mason to act as diocesan missioner.