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William Reid (British Army officer) (1791–1858), British soldier and Governor of the Bermudas, Windward Islands, and Malta •
Sir William Reid (born 1931), British former Parliamentary and Health Service Ombudsman •
William Reid (mining engineer) (1906–1985), Scottish coal expert and co-author of the "Reid Report" on the state of British coal-mining •
William Reid (musician) (born 1958), guitarist with The Jesus and Mary Chain •
William Reid (Scottish businessman) (1842–?), early financier of railroads in Oregon's Willamette Valley •
William Reid (VC) (1921–2001), Scottish World War II war hero •
William Arbuckle Reid (1933–2015), British educator, curriculum theorist, and philosophical disciple of Joseph Schwab •
William Hamilton Reid (died 1826), British poet and hack writer •
William P. Reid (1854–1932), Scottish locomotive engineer •
William Reid (military historian) (1926–2014), Scottish military historian •
William Reid (psychiatrist), American forensic psychiatrist •
William S. Reid (1778–1853), vice president and acting president of Hampden–Sydney College •
William Reid IV, American lawyer •
Gordon Reid (priest) (William Gordon Reid, born 1942), Anglican priest, former Dean of Gibraltar and Vicar General of the Diocese of Europe •
Bill Reid, Haida artist ==Characters==