Surname
- Albert Denison, 1st Baron Londesborough (1805-1860), British Liberal Party politician and diplomat, known as Lord Albert Conyngham
- Hon. Augusta Elizabeth Denison, wife of Arthur Wrottesley, 3rd Baron Wrottesley
- Daniel Denison, English professional golfer
- Daniel R. Denison, professor of management and organization
- Edmund Denison, Chairman of the Great Northern Railway (Great Britain)
- Edward Denison (philanthropist) (1840–1870), English philanthropist
- Edward Denison (bishop) (1801–1854), English bishop
- Edward E. Denison (1873–1953), American congressman
- Edward Fulton Denison (1915–1992), American economist
- Ellery Denison (1900–1989), philatelist of Maryland
- Hugh Denison (1865–1940), Australian businessman, born Hugh Robert Dixson.
- John G. Denison, Former Chairman of ATA Airlines and Global Aero Logistics
- Oswald Denison, New Zealand rower
- Sean Denison (born 1985), Canadian basketball player
- Robert Denison (1697-1765), soldier and political figure in Connecticut and Nova Scotia
- Walter Denison, New Zealand lawn bowler
- William Denison (1804–1871), Lieutenant Governor of Van Diemen's Land, 1847–1855, and Governor of New South Wales, 1855–1861
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