William Henry Harrison Cash (July 19, 1843 – August 13, 1924) was an American businessman and Republican politician.

He was a member of the Wisconsin State Assembly, representing northern Juneau County during the 1877 session.

Born in Flushing, Belmont County, Ohio, Cash moved with his parents to New Lisbon, Wisconsin, in 1861.

At age 20, he enlisted for service in the Union Army and was enrolled in the 10th Independent Battery Wisconsin Light Artillery.

[1] He served with his battery in the western theater of the war, and saw significant combat in Sherman's campaigns through Atlanta, Savannah, and the Carolinas.