Carlos Silvestre Frenk (born October 27, 1951) is a Mexican-British cosmologist. His main interests lie in the field of cosmology, galaxy formation and computer simulations of cosmic structure formation. He won the Gold Medal of the Royal Astronomical Society in 2014.
He was the inaugural Ogden Professor of Fundamental Physics at Durham University in 2001, following an endowment by Sir Peter Ogden. He still holds this chair, and is Director of the Institute for Computational Cosmology at Durham, which is part of the Ogden Centre for Fundamental Physics. He is also Principal Investigator of the Virgo Consortium.
He received a Ph.D. in astronomy from the University of Cambridge in 1981. He is a Fellow of the Royal Society and a member of the Society's Council.