John Joseph Quinn (September 25, 1933 – October 8, 2018) was an American theoretical physicist as well as an academic administrator; he was a former Chancellor and a member of the faculty at The University of Tennessee, Knoxville, US. He was considered to be an expert in the areas of solid-state physics and many-body theory including two dimensional Composite fermions, low-dimensional systems, quantum Hall effect and nanoscience. Quinn was also one of the first researchers to recognize that physics of ‘two-dimensional electronic systems’ needs to be treated as a professional-sub-specialty.