David Williamson (born 1942) is an Australian playwright.
David Williamson may also refer to:
- David Williamson, Baron Williamson of Horton (1934–2015), British and European civil servant
- David Williamson (businessman) (born 1961), Executive Director of Operations at Newcastle United Football Club
- David Williamson (footballer) (born 1975), Hong Kong-born footballer
- David Williamson (soldier) (1752–1814), American colonel in the Pennsylvania militia during the Revolutionary War
- David Williamson (British politician) (1868–1955), British editor and politician
- David G. Williamson, British historian
- David P. Williamson, professor of operations research at Cornell University
- David Williamson, Lord Balgray (1761–1837), Senator of the College of Justice in Scotland
- David Theodore Nelson Williamson (1923–1992), British electronics engineer
- David Williamson (magician) (born 1961), stage magician
- David Williamson (minister) (c1634–1706), Scottish minister and Covenanter
- Dave Williamson, stand-up comedian
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