教宗达马苏斯二世（拉丁文：Damasus II，？－1048年8月9日，又译达苏二世，原名Poppo，1048年7月17日至1048年8月9日在位。

是天主教历史上在位时间第八短的教皇，在位仅仅二十四日，他是由神圣罗马帝国皇帝亨利三世提名因而当选成为教皇，未当选时是Brixen的主教。传言他对亨利三世不忠导致被毒害，更有可能是死于疟疾。

Pope Damasus II (died 9 August 1048), born Poppo, was Pope from 17 July 1048 to his death on 9 August that same year. He was the second of the German pontiffs nominated by Emperor Henry III. A native of Bavaria, he was the third German to become Pope and had one of the shortest papal reigns. He was bishop of Brixen when the Emperor raised him to the papacy.