Understanding Poetry was an American college textbook and poetry anthology by Cleanth Brooks and Robert Penn Warren, first published in 1938. The book influenced New Criticism and went through its fourth edition in 1976.

Cleanth Brooks was an American literary critic and professor. He is best known for his contributions to New Criticism in the mid-20th century and for revolutionizing the teaching of poetry in American higher education. His best-known works, The Well Wrought Urn: Studies in the Structure of Poetry (1947) and Modern Poetry and the Tradition (1939), argue for the centrality of ambiguity and paradox as a way of understanding poetry. With his writing, Brooks helped to formulate formalist criticism, emphasizing "the interior life of a poem" and codifying the principles of close reading.