William Dennison Jr. was a Whig and Republican politician from Ohio. He served as the 24th governor of Ohio and as U.S. Postmaster General in the Cabinet of President Abraham Lincoln during the American Civil War.
- Occupation
- politician, lawyer
- Position held
- United States Postmaster General, Governor of Ohio, member of the State Senate of Ohio
- Citizenship
- United States
- Born
- November 23, 1815
- Died
- June 15, 1882
