Nancy Cartwright FBA (born 1944) is a professor of philosophy at the London School of Economics and the University of California at San Diego, and a recipient of a MacArthur Fellowship. Cartwright is the vice-president elect of the Pacific Division of the American Philosophical Association. She is Fellow of the British Academy and member of the American Academy of Arts and Sciences and of the German Academy of Sciences Leopoldina.
Her PhD in philosophy was earned at the University of Illinois at Chicago under the direction of Brian Skyrms. She previously taught at Stanford University and was married to the philosopher Stuart Hampshire, now deceased. She was also previously married to Ian Hacking. Her research interests include the history and philosophy of science, especially economics and physics, and causal inference and objectivity in science. She has also written on the history of logical positivism. Her approach to the philosophy of science is associated with the so-called "Stanford school" of John Dupré, Peter Galison, and Ian Hacking.