John Niel McLeod was a prominent Reformed Presbyterian pastor, theologian, and educator who served for over forty years as pastor of the First Reformed Presbyterian Church in New York City after succeeding his father, Alexander McLeod, in 1833. A graduate of Columbia College and later professor of doctrinal theology in the Reformed Presbyterian Seminary, McLeod was widely respected for his preaching, theological writings, and leadership within the Reformed Presbyterian Church, including service as a Civil War chaplain and delegate to the Evangelical Alliance in Paris.