Robert Ritchie (March 6, 1845 – January 7, 1907) was a prominent American Anglo-Catholic priest, author, and leader. He was born in Philadelphia and graduated from the University of Pennsylvania where he was a member of the Philomathean Society (1862); he was next graduated from the General Theological Seminary (1867) in New York. He was made deacon on June 30, 1867, and ordained to the priesthood in 1869. Ritchie served as curate at both the Church of the Messiah and the Church of the Advent in Boston.
Ritchie was elected rector of the Church of St. James the Less, Philadelphia in 1870 and served as rector for the ensuing 37 years. He was a deputy to the General Convention of the Protestant Episcopal Church in 1904. He was also a founder in 1897 of the Clerical Union for the Maintenance and Defense of Catholic Principles and a member of the Catholic Club of Philadelphia.