Joseph Hinckley Clark (September 7, 1837 – November 27, 1889) was a member of the Clark banking family of Philadelphia, Pennsylvania; an officer in the 6th Pennsylvania Cavalry who distinguished himself in combat during the American Civil War;[1] and a director of the Lake Superior and Mississippi Railroad.

He joined the Commonwealth Artillery as a private in the spring of 1861, then accepted a commission in the 6th Pennsylvania Cavalry, another organization of the elite and one that distinguished itself in battle.

("The Sixth Pennsylvania Cavalry, also known as Rush’s Lancers, was a completely volunteer unit and one of the finest regiments to serve in the Civil War.

Tracing their history from George Washington’s personal body guard during the Revolutionary War, many of the men of the Sixth Pennsylvania were the cream of Philadelphia society...," wrote historian Eric J.

[6] Later, he and his men fought at the Battle of Trevilian Station (June 11–12, 1864), where on the first day they helped "to drive the rebels from the railway cut and a brick kiln, behind which they had entrenched themselves."