Andrew Christopher Fabian (born 20 February 1948) is a British astronomer and astrophysicist.
He has been Director of the Institute of Astronomy, University of Cambridge since 2013.
He was a Royal Society Research Professor at the Institute of Astronomy, Cambridge from 1982 to 2013, and Vice-Master of Darwin College, Cambridge from 1997 to 2012.
He served as president of the Royal Astronomical Society from May 2008 through to 2010.