Brian David Ripley (born 29 April 1952) is a British statistician. From 1990, he was professor of applied statistics at the University of Oxford and is also a professorial fellow at St Peter's College. He retired August 2014 due to ill health.

Ripley has made contributions to the fields of spatial statistics and pattern recognition. His work on artificial neural networks in the 1990s helped to bring aspects of machine learning and data mining to the attention of statistical audiences.He emphasised the value of robust statistics in his books Modern Applied Statistics with S and Pattern Recognition and Neural Networks.He receive Guy Medal in Silver (2013) of the Royal Statistical Society.