Karl Kaspar Reitenberger (December 29, 1779 – March 21, 1860) was a premonstratensian priest.
Born in Úterý to a miller, he joined Teplá Abbey in 1800.
After studying theology in Prague he was ordained as a priest in 1804.
In 1813 he was elected abbot of Teplá Abbey.
He was instrumental in turning Mariánské Lázne into a spa town.
After a dispute over the abbey finances in 1827 he had to step down as abbot.
He moved to Innsbruck where he lived until his death.