John Alleyne
John Alleyne or John Alleyn may refer to:
- Sir John Alleyne, 1st Baronet, Speaker of the House of Assembly of Barbados
- Sir John Alleyne, 3rd Baronet, British businessman and engineer
- John Alleyne (cricketer), Australian cricketer
- John Alleyne (dancer), Canadian ballet dancer and choreographer
- John Alleyne (priest), Dean of St Patrick's Cathedral, Dublin
- John Alleyn (barrister), English barrister and MP
- John Alleyn (mercer), Lord Mayor of London
- John Alleyn (surgeon) English surgeon and schoolmaster
- John Alan, Alen, or Alleyn English government official in Ireland