Marion R. Buller (also known as Marion Buller Bennett) is a First Nations jurist in British Columbia, serving as the Chief Commissioner for the National Inquiry into Missing and Murdered Indigenous Women and Girls. A member of the Mistawasis First Nation, she was the first First Nations woman to be appointed as a B.C. Provincial Court Judge in 1994, and presided in courts throughout B.C. She was instrumental in establishing the First Nations Courts of British Columbia in 2006 and the Aboriginal Family Healing Court in 2016. Chief Commissioner Buller served as President of the Indigenous Bar Association and served as Director of the B.C. Law Court Society, B.C. Law Foundation, B.C. Police Commission and the B.C. Mediators Roster. Chief Commissioner Buller has lectured and written numerous articles and papers about aboriginal law, criminal law, family law and human rights.
In 2012, she was given the University of Victoria Faculty of Social Science Distinguished Alumni Award. In 2016, Maclean's listed her as one of six people who might be especially influential on policy in the Trudeau government.