Augustin Pfleger (1635 – after 23 July 1686) was a German Bohemian composer.
Pfleger was born at Schlackenwerth (now Ostrov) and became a court musician at Schlackenwerth.
In 1662 he moved to the court of the Duke of Mecklenburg in Güstrow and in 1665 to Gottorf as Kapellmeister at the Schleswig-Holstein court.
In 1686 he was again at Schlackenwerth, where he died.