Chapman Cohen (1 September 1868 – 4 February 1954) was a leading English atheist and secularist writer and lecturer.
Chapman Cohen was the elder son of Enoch Cohen, a Jewish confectioner, and his wife, Deborah (née Barnett). He attended a local elementary school but was otherwise self-educated. He had read Spinoza, Locke, Hume, Berkeley, and Plato by the time he was eighteen.
Cohen recalled that he had "little religion at home and none at school", as he was withdrawn from Religious Instruction classes.
Cohen and his wife had two children; a son (who entered the medical profession) and a daughter, who died at the age of 29.
On his death, The Times printed a short obituary of Cohen, which said:
He was the author of many books setting forth the freethought philosophy of life, which had a large sale, and he was outstanding as a forthright, witty and courteous debater and lecturer.