Kathleen Shanahan Fisher is an American computer scientist who specializes in programming languages and their implementation. She is a professor of computer science at Tufts University.
Fisher graduated with distinction from Stanford University in 1991, and stayed at Stanford for her graduate studies, earning a Ph.D. in 1996 under the supervision of John C. Mitchell. She worked at AT&T Labs from 1996 until 2011, when she moved to Tufts. From 2011 to 2014 she was also a program manager at DARPA.
Fisher is one of the authors of the Moby experimental concurrent programming language. She was program chair of OOPSLA in 2011.
In 2010 she was elected as a Fellow of the Association for Computing Machinery "for contributions to programming language design, theory, and practice, and for service to the computing community."