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