Katharine Tynan (born January 23, 1861, Dublin, Ireland—died April 2, 1931, Wimbledon, Surrey, England) was an Irish poet and novelist whose works are dominated by the combined influences of Roman Catholicism and Irish patriotism.
Like the poet William Butler Yeats, she developed a deep and abiding interest in Celtic mythology. Her Collected Poems were published in 1930. A prodigious writer, she produced five autobiographical volumes: Twenty-five Years (1913), The Middle Years (1917), The Years of the Shadow (1919), The Wandering Years (1922), and Memories (1924). She also wrote more than 100 romantic novels, the best known of which is The House in the Forest (1928).