Harrison Horton Dodd (February 29, 1824 – June 2, 1906) was a founder of the 1860s-era OSL (Order of Sons of Liberty), a paramilitary secret society which was a continuation and/or extension of the KGC (Knights of the Golden Circle). The basic goal of members of the OSL was to thwart the war efforts of the Union military forces (as epitomised in the war policies of Abraham Lincoln and his close political and military allies), while remaining citizens of the United States.