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- Damien Chapman, British rugby league player
- Dave Chapman (born 1973), British actor, television presenter, puppeteer and voice artist
- David Chapman
- David Chapman (journalist) (born 1976), American journalist
- David Chapman (scientist) (1869–1958), English physical chemist
- David Chapman (cricketer) (1855–1934), English cricketer
- David Chapman (handballer), American handballer
- Dean Roden Chapman (1922–1995), American mechanical engineer at NASA and Stanford University
- Dick Chapman (1911–1978), American amateur golfer
- Dinos Chapman, (born 1962), English conceptual artist
- Donald Chapman, Baron Northfield (born 1923), British Labour Party politician and life peer
- Donovan Chapman, American country music artist
- Doug Chapman
- Doug Chapman (stuntman), American stunt performer, actor and stunt coordinator
- Doug Chapman (American football) (born 1977), American football player
- Duane Chapman
- Duane "The Dog" Chapman (born 1953), American Hawaii-based bail bondsman and bounty hunter
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