Percy R. Kelly (July 13, 1870 – June 14, 1949) was an American attorney and jurist in the state of Oregon. He was the 26th Chief Justice of the Oregon Supreme Court, serving on Oregon’s highest court from 1930 to 1949. Born in Iowa, Kelly was an attorney in Oregon and member of both chambers of the Oregon Legislative Assembly, as well as a trial court judge prior to joining the state supreme court.