Hannah Marion Critchlow is a British scientist, writer, and broadcaster. Her academic research has focused on cellular and molecular neuroscience. In 2014 the Science Council named her as one of the ten leading communicator scientists in the UK. In 2019 Nature listed her as one of Cambridge Universities Rising Stars in Biological Sciences. In 2022 she was awarded an Honorary Doctorate from Brunel University for her work in neuroscience and communication.