George Duffield (July 4, 1794 - June 26, 1868) was a leading nineteenth-century New School Presbyterian minister who bore the same name as his father and grandfather. His evolution from unconventional doctrinal leanings to more orthodox and standard ones typified the moderation on both sides which led to reunion with the Old School Presbyterians in 1870. Duffield also was a leading Presbyterian premillennialist, and in 1842 authored, Dissertations on the prophecies relative to the second coming of Jesus Christ.