Barry Eric Odell Pain (28 September 1864 – 5 May 1928) was an English journalist, poet and writer.
Born in Cambridge, Barry Pain was educated at Sedbergh School and Corpus Christi College, Cambridge. He became a prominent contributor to The Granta. He was known as a writer of parody and lightly humorous stories.
In 1889, Cornhill Magazine's editor, James Payn, published his story "The Hundred Gates", and shortly afterwards Pain became a contributor to Punch and The Speaker, and joined the staffs of the Daily Chronicle and Black and White. Pain supposedly "owes his discovery to Robert Louis Stevenson, who compares him to De Maupassant". From 1896 to 1928 he was a regular contributor to the Windsor Magazine.