Father Brown is a fictional Roman Catholic priest and amateur detective. He is featured in 53 short stories by English author G. K. Chesterton, published between 1910 and 1936. Father Brown solves mysteries and crimes using his intuition and keen understanding of human nature. Chesterton loosely based him on the Rt Rev. Msgr John O'Connor (1870–1952), a parish priest in Bradford, who was involved in Chesterton's conversion to Catholicism in 1922. Since 2013, the character has been portrayed by Mark Williams in the ongoing BBC Television Series Father Brown.

Gilbert Keith Chesterton was an English author, philosopher, Christian apologist, and literary and art critic.