Mark Hanna (1837–1904) was an American industrialist and politician.
Mark Hanna may also refer to:
Mark Hanna (screenwriter) (1917–2003), American screenwriter and actor Mark Hanna, American stockbroker who was portrayed in the film The Wolf of Wall Street Mark Hanna, defendant who was acquitted in the English court case R v Coulson, Brooks and others
See also Mark Hanna Crouter (1897–1942), U.S. Navy officer and Navy Cross recipient Marcus Hanna (lighthouse keeper) (1842–1921), lighthouse keeper and Medal of Honor recipient