David Robert Grimes (born 1985) is an Irish science writer with professional training in physics and cancer biology, who contributes to several media outlets on questions of science and society. He has a diverse range of research interests and is a vocal advocate for increased public understanding of science. He was the 2014 recipient of the Sense About Science/Nature Maddox Prize for "Standing up for Science in the face of Adversity". He is a fellow with the Committee for Skeptical Inquiry.