Paul Diller is a visiting professor of law in fall 2024.  He is a professor of law and the inaugural Roscoe C. & Debra H. Distinguished Faculty Scholar at Willamette University in Salem, Oregon. His professional work focuses on state and local government law and public health law. He has written extensively about state preemption of local authority, as well as the structures underlying that dynamic, such as partisan gerrymandering. More recently, Diller has examined the constitutional and other legal issues that have arisen in states’ and cities’ response to the COVID-19 pandemic, particularly in their use of emergency authority.

Diller was a participant in the National League of Cities’ Home Rule for the 21st Century Project in 2019-20. In September 2017, Diller authored an amicus brief on behalf of several municipal organizations and local government law professors in Gill v. Whitford, which challenged gerrymandering of state legislative districts.

Diller graduated from the University of Pennsylvania and the University of Michigan Law School, both magna cum laude. After law school, he clerked for Chief Judge Edward R. Becker of the United States Court of Appeals for the Third Circuit in Philadelphia. He then practiced law as a trial attorney in the Civil Division of the U.S. Department of Justice in Washington, D.C., where he litigated constitutional, administrative, and Freedom-of-Information-Act cases, among others. Diller has been a visiting professor at Lewis and Clark Law School (2022), the University of Michigan Law School (2008), and also taught in Willamette’s summer program in Shanghai at the East China University of Political Science and Law in 2013.  Now visiting at Oregon Law, Diller is the only active tenured or tenure-track law professor to have taught at least one full-time semester at each of the three Oregon law schools.