Jacob Thorbjørn Olesen (born 21 December 1989) is a Danish professional golfer who plays on the European Tour, where he has won five times including the 2016 Turkish Airlines Open and the 2018 Italian Open. He has also won two important pairs events, representing Denmark, the 2016 World Cup of Golf with Søren Kjeldsen and the 2017 GolfSixes with Lucas Bjerregaard