According to Official Guinness Records,
The most holes-in-one in an Olympics golf tournament is 1, achieved by Justin Rose (UK) at the 2016 Olympic Games, in Rio de Janeiro, Brazil, on 14 August 2016.Rose became the first golf gold medalist since 1904, as golf returned from a 112 year absence from the games.
For a complete list of 2016 records, please visit 2016 Guinness Records in Brazil.