William H. "Chip" Mellor (December 31, 1950 – October 11, 2024) was an American lawyer who co-founded the Institute for Justice (IJ).[1] Mellor served as IJ's founding president and general counsel and later as chairman of the organization's board of directors.[2] During his career at IJ, Mellor pursued constitutional litigation in four areas: economic liberty, property rights, school choice, and free speech.