Robert Knight Rudolph (June 8, 1906 — July 14, 1986) was an American Reformed Episcopal minister and theologian. He served as Professor of Systematic Theology and Christian Ethics at the Theological Seminary of the Reformed Episcopal Church in Philadelphia for forty-nine years before his retirement in 1981. Together Rudolph and his father trained men for the gospel ministry at this institution for a total of seventy-four years. Rudolph was known for his strict adherence to Calvinism and presuppositional apologetics.