Russell Grant Foster, CBE, FRS FMedSci (born 1959) is a British professor of circadian neuroscience, the Director of the Nuffield Laboratory of Ophthalmology and the Head of the Sleep and Circadian Neuroscience Institute (SCNi).
He is also a Nicholas Kurti Senior Fellow at the Brasenose College at the University of Oxford.
Foster and his group are credited with key contributions to the discovery of the non-rod, non-cone, photosensitive retinal ganglion cells (pRGCs) in the mammalian retina which provide input to the circadian rhythm system.
He has written and co-authored over a hundred scientific publications.