The Charles Williams Society exists to promote the study and appreciation of the life and writings of Charles Walter Stansby Williams. Williams is best known as a leading member of the Oxford literary group, the "Inklings", whose chief figures were CS Lewis and JRR Tolkien. He was a figure of enormous interest in his own right: a prolific author of plays, fantasy novels, poetry, theology, biography and criticism.

The Society met twice a year, and published The Charles Williams Quarterly, which normally included the papers delivered at the meetings. It also occasionally had short residential conferences, the most recent having taken place on July 4th-6th, 2008. It maintains a lending and reference library.