Karen Masters (born 1979) is an Astrophysicist and Full Professor of Astrophysics in Haverford College,[1] Pennsylvania exploring galaxy formation.

[3] She received a PhD in Astronomy from Cornell University in 2005, entitled "Galaxy flows in and around the Local Supercluster", under the supervision of Martha Haynes and Riccardo Giovanelli.

[5] Masters "unveiled the most complete 3-D map of the local universe (out to a distance of 380 million light-years) ever created"[6] in 2011 at the 218th meeting of the American Astronomical Society.

[7] In 2010 Masters was awarded a Leverhulme Early Career Fellowship, for a project entitled "Do bars kill spiral galaxies?".

[9] She has been working on extragalactic astronomy, and in 2018 was appointed as Associate Professor at Haverford College in Pennsylvania.