Rhett Larson is a Morrison Fellow in Water Law and associate professor in the Sandra Day O'Connor College of Law. He is also a faculty fellow in the Center for Law and Global Affairs, and the Center for Law, Science, and Innovation. He is a senior research fellow with the Kyl Center for Water Policy at ASU's Morrison Institute for Public Policy.

Professor Larson’s research and teaching interests are in property law, administrative law, and environmental and natural resource law, in particular, domestic and international water law and policy. 

Professor Larson’s research focuses on the impact of technological innovation on water rights regimes, in particularly transboundary waters, and on the sustainability implications of a human right to water. He works on dispute resolution and improved processes in water rights adjudications in Arizona and the Colorado River Basin with the Kyl Center for Water Policy. Professor Larson was a visiting professor and Fulbright Scholar at the Pontifical Catholic University of Ecuador, a visiting fellow with the University of New South Wales in Sydney, Australia, and works in the Middle East on water security issues.

Professor Larson also practiced environmental and natural resource law with law firms in Arizona, focusing on water rights, water quality, and real estate transactions.