Susan Jean Friedlander (née Poate; born January 26, 1946) is an American mathematician.

She completed her doctorate in 1972 from Princeton University under the supervision of Louis Norberg Howard.

[1][2] 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.

From 1996–2010, Friedlander served as an officer of the American Mathematical Society in the role of Associate Secretary.

[1][3] Her other leadership activities include membership of the Scientific Advisory Committee of the Mathematical Sciences Research Institute (2001–2006), the Board of Mathematical Sciences and their Applications (2008–2011), the Section A Steering Committee of the American Association for the Advancement of Science (2013–2015), and the MIT Mathematics Department Visiting Committee (2013–2021).