Stefan Valentini (born 15 July 1996) is an Australian footballer who plays as a striker for Oakleigh Cannons FC.
Born in Perth, Valentini holds a dual citizenship due to his Italian heritage.
Valentini was named National Premier Leagues Western Australia Under 20 Player of the Year (2014) after playing only 12 games of the season and netting 12 goals for Balcatta FC.
Valentini won the Dylan Tombides Young Player of the Year award at the conclusion of the 2015 NPL season, after playing only 14 matches.
In January 2019, Valentini joined National Premier Leagues Victoria side Avondale FC, scoring on his second start for the club.