Johann Baal also Pater Marianus Baal (18 December 1657 in Karlstadt – 1701) was a German composer.
Baal was attached to the court of the Prince-Bishopric of Bamberg.
Among Baal's surviving works is a Mass in A, the five sections of which survive in the handwriting of a copy by Johann Sebastian Bach and his cousin Johann Gottfried Walther.