The 2015–16 FC Red Bull Salzburg season is the 83rd season in club history. They come into the season as defending champions and Austrian Cup winners.

On matchday one, on 25 July, Red Bull lost 2–1 to Mattersburg.Markus Pink and Alexander Ibser scored for Mattersburg and Naby Keïta scored for Red Bull. Red Bull finished the matchday tied for seventh place. Red Bull lost 2–1 to Rapid Wien on Matchday two, on 1 August.Athanasios Petsos and Stefan Schwab scored for Rapid Wien and Dimitri Oberlin scored for Red Bull. Red Bull finished the matchday in ninth place. On matchday three, on 8 August, Red Bull and Admira Wacker finished in a 2–2 draw.Yordy Reyna and Naby Keïta scored for Red Bull and Dominik Starkl and Markus Lackner scored for Admira Wacker. Red Bull finished the matchday in seventh place.

Red Bull opened up their season on 18 July with three goals each from Jonathan Soriano and Marco Djuricin and a goal from Takumi Minamino.

Red Bull enterted the competition in the third qualifying round. They were drawn against the winner of the fixture between Malmö and Žalgiris. Malmö advanced to face Red Bull. The first leg took place on 29 July. Red Bull won 2–0 with goals from Andreas Ulmer and Martin Hinteregger. Hinteregger scored from the penalty spot. The second leg was played on 5 August. Red Bull lost 3–0 to get knocked out 3–2 on aggregate.Nikola Đurđić, Markus Rosenberg, and Vladimir Rodić scored for Malmö.

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