Hartley Coleridge, possibly David Hartley Coleridge (19 September 1796 – 6 January 1849), was an English poet, biographer, essayist, and teacher. He was the eldest son of the poet Samuel Taylor Coleridge. His sister Sara Coleridge was a poet and translator, and his brother Derwent Coleridge was a scholar and author. Hartley was named after the philosopher David Hartley.