Sara Anna van de Geer (born 7 May 1958, Leiden) is a Dutch statistician who works as a professor in the department of mathematics at ETH Zurich. She is president of the Bernoulli Society for Mathematical Statistics and Probability for the term 2015–2017.
Van de Geer is the daughter of psychologist John P. van de Geer. She earned a master's degree in 1982 and a doctorate in mathematics in 1987 from Leiden University. Her dissertation, entitled Regression Analysis and Empirical Processes, was supervised by Willem Rutger van Zwet and Richard D. Gill. She taught at the University of Bristol from 1987 to 1988, at Utrecht University from 1989 to 1990, at Leiden University from 1990 to 1997 and 1999 to 2005, and at Paul Sabatier University in Toulouse, France, from 1997 to 1999, before moving to ETH Zurich in 2005.
She was an invited speaker at the International Congress of Mathematicians in 2010. She is a member of the Academy of Sciences Leopoldina and of the International Statistical Institute, a corresponding member of the Royal Netherlands Academy of Arts and Sciences, and a fellow of the Institute of Mathematical Statistics.