John-Dylan Haynes (born 1971) is a British-German brain researcher. Haynes studied psychology and philosophy at the University of Bremen from 1992 to 1997. In 2003 he received his doctorate from the Institute of Biology in Bremen. After research stays in Magdeburg, Plymouth (Plymouth Institute of Neuroscience, 2002-2003) and London (Institute of Cognitive Neuroscience and Wellcome Department of Imaging Neuroscience, University College London, 2002-2005) he became head of a research group at the Max Planck Institute for Cognitive and Neurosciences in Leipzig in 2005.