Madallah Al-Olayan is a Saudi Arabian full-back from Buraidah. He came through Al-Taawoun, made his professional debut in 2012, and later played for Al-Hilal and Al-Ittihad before joining Al-Ettifaq in 2024. His honours include the King's Cup with Al-Taawoun, league and continental titles with Al-Hilal, and domestic silverware with Al-Ittihad.