William Uhler Hensel (December 4, 1851 – February 27, 1915) was a Pennsylvania newspaper editor, lawyer, author, and state Attorney General. He was very active in politics, and a noted political speaker, but steadfastly declined any official post beyond his term as Attorney General.

Hensel authored several books, most notably biographies of Grover Cleveland and his running mates Thomas A. Hendricks and Allen G. Thurman.

Hensel was born the son of George Washington Hensel, a very successful businessman: president of the local bank, director of the local railroad, and trustee of Franklin and Marshall College, and Anna Maria Uhler.

Hensel attended Franklin and Marshall College and graduated in 1870.

Hensel had an early interest in politics, and in 1872 he canvassed for Charles R. Buckalew in his unsuccessful run for governorship.

Hensel was admitted to the bar in 1873.

In 1874, Hensel bought a half-interest in the Lancaster Intelligencer and became its editor. Under his direction, the paper went from the typical small-town litany of local trivia to the more big-town news-as-drama and political advocacy.

In 1875, Hensel became even more involved in local Democratic politics, being elected Chairman of the Democratic Committee of Lancaster County.