The title Sir Guy is most commonly ascribed to Sir Guy of Gisbourne, a fictional character in Robin Hood folklore.

Sir Guy may also refer to:

People

Sir Guy Acland, 6th Baronet, British Army officer and member of the Royal Household Sir Guy Francis Boileau, 8th of the Boileau baronets Sir Guy Bracewell-Smith, 3rd Baronet, of the Smith baronets Sir Guy Brian of Torbryan, Devon, father of Guy de Brian, 4th Baron Brian Sir Guy Campbell, 1st Baronet, Major-General in the British Army Sir Guy Campbell, 5th Baronet, a British colonel Sir Guy Carleton, 1st Baron Dorchester Sir Guy Calthrop, 1st Baronet Sir Guy Dawber, an English architect Sir Guy Garrod, senior UK Royal Air Force officer Sir Guy Gaunt, Australian-born officer of the British Royal Navy Sir Guy Granet, British railway administrator Sir Guy Green (judge), Governor of Tasmania Sir Guy Lloyd, 1st Baronet, Scottish Unionist Party politician Sir Guy Anstruther Knox Marshall, British entomologist and authority on Curculionidae Sir Guy Palmes, High Sheriff and Justice of the Peace for Yorkshire. Sir Guy Powles, New Zealand diplomat and Governor of Western Samoa Sir Guy Russell, British naval commander Sir Guy Salisbury-Jones, Major-General in the Royal Household Diplomatic Corps Sir Guy Standing (actor), an English actor Sir Guy Williams (British Army officer) who served in World War II Sir Guy Francis Laking, artist and first keeper of the London Museum Sir Guy Douglas Arthur Fleetwood Wilson, a British public servant in colonial India Sir Guy Of Warwick, stage name of Renaissance Festival performer

In fiction Sir Guy, a character in Timeline (novel) by Michael Crichton Sir Guyon fictional character in Spenser's The Faerie Queene Sir Guy Paynter, a character in Crusade (Laird novel) Sir Guy de Guide, an aristocratic fox in Bertie the Bunyip TV puppet show

Other

Sir Guy Carleton Elementary School in Vancouver, Canada Sir Guy Carleton Secondary School in Ottawa, Canada