John McLeod Campbell (4 May 1800 – 27 February 1872) was a Scottish minister and Reformed theologian. In the opinion of one German church historian, contemporaneous with Campbell, his theology was a highpoint of British theology during the nineteenth century. James B. Torrance ranked him highly on the doctrine of the atonement, placing Campbell alongside Athanasius of Alexandria and Anselm of Canterbury. Campbell took his cue from his close reading of the early Church Fathers, the historic Reformed confessions and catechisms, John Calvin, Martin Luther's commentary on Galatians, and Jonathan Edwards' works.