Stewart Duckworth Headlam (1847–1924) was an English Anglican priest who was involved in frequent controversy in the final decades of the nineteenth century. Headlam was a pioneer and publicist of Christian socialism, on which he wrote a pamphlet for the Fabian Society, and a supporter of Georgism. He is noted for his role as the founder and warden of the Guild of St Matthew and for helping to bail Oscar Wilde from prison at the time of his trials.