•
David Douglas, Lord Reston (1769–1819), Scottish judge and Adam Smith's heir •
David Douglas (botanist) (1799–1834), Scottish botanist •
David Douglas (publisher) (1823–1918), Scottish publisher •
David L. Douglas (1845–1913), American businessman and politician •
David C. Douglas (1898–1982), British historian of the Normans •
David "Dathaí" Douglas (died 2016), an Irish criminal •
David Douglas High School, a public high school in Portland, Oregon ==See also==