D
- Daedalus Howell (born 1972), American writer
- Dashiell Howell (born 1997), American actor
- David Howell, Baron Howell of Guildford (born 1936), British Conservative politician
- David Howell (British Army officer), British barrister and officer
- David Howell (chess player) (born 1990), British chess grandmaster
- David Howell (dean) (1831–1903), British clergyman
- David Howell (footballer) (born 1958), English footballer
- David Howell (golfer) (born 1975), English golfer
- David Howell (jurist) (1747–1824), American jurist
- David Howell (rugby league) (born 1983), Australian rugby league player
- Dean Howell (born 1980), English footballer
- Deborah Howell (1941–2010), American journalist
- Delles Howell (born 1948), American football player
- Denis Howell (1923–1998), British Labour politician
- Denise Howell (born c. 1965), American lawyer and blogger
- Dixie Howell (1912–1971), American football player
- Dixie Howell (baseball catcher) (1920–1990), American baseball player
- Dixie Howell (baseball pitcher) (1920–1960), American baseball player
- Dorothy Howell (1898–1982), British composer and pianist
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