William Dennison or Denison may refer to:
- William Dennison (academic), 18th-century Master of University College, Oxford
- William Dennison, Jr. (1815–1882), American politician, Governor of Ohio and U.S. Postmaster General
- William Dennison (Canadian politician) (1905–1981), Mayor of Toronto, Member of Provincial Parliament
- William Neil Dennison (1841–1904), American Civil War artillery officer
- William Denison (1804–1871), British colonial official, Governor of New South Wales, 1855–1861, and Governor of Madras, 1861–1866
- William Denison, 1st Earl of Londesborough (1834–1900), British peer and Liberal politician
- William Denison (cricketer) (1801–1856), English cricketer and cricket official
- William Evelyn Denison (1843–1916), British Member of Parliament for Nottingham, 1874–1880
- William Kendall Denison (born 1869), American classicist, and educator
- William Beckett-Denison (1826–1890), English banker and Conservative politician
- William Denison (MP for West Surrey), British Member of Parliament for West Surrey
- Doug Dennison (William Douglas Dennison, born 1951), American football player
Famous quotes containing the word william:
“If you give me your attention, I will tell you what I am:
I’m a genuine philanthropist—all other kinds are sham.
Each little fault of temper and each social defect
In my erring fellow creatures, I endeavor to correct.”
—Sir William Schwenck Gilbert (1836–1911)