Ali Diab (Arabic: علي دياب; born 23 May 1982 in Hafeir al-Fouqa, Rif Dimashq, Syria) is a Syrian professional association football player. He last played for Al-Wahda in the Syrian Premier League, the top division in Syria. He played as a defender, wearing the number 2 jersey for Al-Wahda and for the Syrian national football team he wears the number 3 shirt.