John O'Neal(l) may refer to:
John O'Neal (Medal of Honor) (born 1841), U.S. sailor who was awarded the Medal of Honor John O'Neal (politician) (active since 2010), American politician in West Virginia John H. O'Neall (1838–1907), American politician from Indiana John Belton O'Neall, judge who served on the precursor to the South Carolina Supreme Court Johnny O'Neal (born 1956), American pianist
See also John O'Neil (disambiguation) John O'Neill (disambiguation)