Judge Reuben Cone (July 14, 1788 – April 10, 1851) was an important pioneer and landowner in Atlanta, Georgia. He was an early pioneer in DeKalb County, Georgia where he married Lucinda Shumate (1796–1872) and served on an education committee in 1823. He began serving as a justice of the inferior court there in February 1825. This was at a time when Decatur consisted of a dozen log cabins.