Other
- David Allan (painter) (1744–1796), Scottish painter
- David Oliver Allen (1800–1863), American missionary
- David Allan (police officer) (1879–1961), British police officer
- William Edward David Allen (1901–1973), Irish-born English scholar, diplomat, politician and businessman
- David Allen (playwright) (born 1936), Australian playwright
- David Allen (author) (born 1945), productivity trainer and consultant, best known for "Getting Things Done"
- David Allen (game designer) (born 1972), creator of a number of popular niche-games
- David Allen (Royal Navy officer) (c. 1934–1994)
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