Arthur Cayley Headlam CH (2 August 1862 – 17 January 1947) was an English theologian who served as Bishop of Gloucester from 1923 to 1945.

[1] The historian James Wycliffe Headlam was his younger brother.

[1] He was Professor of Dogmatic Theology at King's College London from 1903 to 1916, where he served as Principal from 1903 to 1912 and as the first Dean from 1908 until 1913.

[3] At the time of the 1926 General Strike, he opposed the intervention of some of the other bishops.

[6] During the Nazi rise to power in 1933 he blamed German Jews for causing their own persecution, writing that they caused "the violence of the Russian Communists" and "Socialist communities" and were "not altogether a pleasant element in German, and in particular Berlin life.