Carl Wilhelm August Blum (1786 – 2 July 1844) was a German singer, librettist, stage actor, director, guitarist and opera and song composer. Philip J. Bone wrote that Blum was "a universal genius, uniting in one person the poet, the dramatist, composer, singer and performer." He was composer to the Court of the King of Prussia.
He has been confused with or named incorrectly in literature as Karl Ludwig Blum.