Henry Denny (1803–1871) was an English museum curator and entomologist.
Henry Denny may refer also to: Henry Denny (rugby league), Australian rugby league player Sir Henry Denny, 7th Baronet (1878–1953), of the Denny baronets Henry Denny (MP), MP for St Germans
See also Henry Denny Denson (1715–1780), Irish-born soldier and political figure in Nova Scotia