Demons and Dinosaurs is a 1970 collection of poetry by American writer L. Sprague de Camp, published by Arkham House in an edition of 500 copies. It was de Camp's first book published by Arkham House. In addition to de Camp's poems, the book contains an introductory piece about the author by fellow writer Lin Carter. Most of the poems in the collection were incorporated into de Camp's later poetry collections, Phantoms and Fancies and Heroes and Hobgoblins, though the arrangement was different in each instance. "The Ogre" is shared with Heroes and Hobgoblins only.