Alois-Konstantin, 9th Prince of Löwenstein-Wertheim-Rosenberg, full German name: Alois Konstantin Karl Eduard Joseph Johann Konrad Antonius Gerhard Georg Benediktus Pius Eusebius Maria, Fürst zu Löwenstein-Wertheim-Rosenberg (born 16 December 1941 in Würzburg, Bavaria) is a German businessman and, since 1990, the head of the mediatised House of Löwenstein-Wertheim-Rosenberg, the Catholic cadet line of the Princes of Löwenstein-Wertheim, itself the patrilineally senior but morganatic branch of the royal house of Wittelsbach, which ruled the Kingdom of Bavaria until 1918.

Alois was born in Würzburg, the fifth child and only son of Karl, Prince of Löwenstein-Wertheim-Rosenberg and his wife, Carolina dei Conti Rignon.

He and his sisters spent their childhood in Bronnbach, and Alois attended school in Miltenberg.

After working for Gulf Oil in Pittsburgh, he was director of Merck Finck & Co and LGT Bank.

He also serves as the director of the Forum of German Catholics' Congress on Joy and Faith.