Which Christian denomination did C.S. Lewis belong to?

C.S. Lewis belonged to Anglicanism.

Lewis was raised in the Church of Ireland, part of the Anglican tradition. Although he became an atheist during adolescence, he returned to Christian belief as an adult and joined the Church of England. His public writing often emphasized beliefs shared across Christian traditions rather than denominational differences.

Lewis became a theist around 1930 and a Christian in 1931. His conversion was shaped by reading, philosophical reflection, and conversations with fellow writers, including J.R.R. Tolkien. He remained an Anglican for the rest of his life.

His ecumenical approach can cause confusion about his denomination. Lewis wrote for a wide Christian readership and discussed central Christian doctrines, but he was not a Roman Catholic or an Eastern Orthodox Christian. His Anglican identity also fits his academic and church context in England, where he taught at Oxford and later Cambridge.