Susan Friedlander is an American mathematician. Her research concerns mathematical fluid dynamics, the Euler equations and the Navier-Stokes equations. Friedlander graduated from University College, London with a BS in Mathematics in 1967. She was awarded a Kennedy Scholarship to study at MIT, where she earned an MS in 1970. She completed her doctorate in 1972 from Princeton University under the supervision of Louis Norberg Howard. From 1972–1974, Friedlander was a Visiting Member at the Courant Institute of Mathematical Sciences, followed by a year as an instructor at Princeton University. In 1975, she joined the faculty in the Mathematics department at the University of Illinois at Chicago. In 2007, she moved to the University of Southern California where she is Professor of Mathematics and the Director of the Center for Applied Mathematical Sciences.