William Fairbairn (disambiguation)

Sir William Fairbairn (1789–1874) was a Scottish engineer.

William Fairbairn may also refer to:

• William E. Fairbairn (1885–1960), British soldier and police officer
• William Fairbairn & Sons, an engineering works in Manchester, England
• Bill Fairbairn (born 1947), ice hockey player
• William Alexander Fairbairn (1902–1984), British forester and ornithologist
• William Ronald Dodds Fairbairn (1889–1964), member of the British Psychoanalytical Society