Atticus (d. 425 or October 10, 426) was the archbishop of Constantinople, succeeding Arsacius of Tarsus in March 406. He had been an opponent of John Chrysostom and helped Arsacius of Tarsus depose him, but later became a supporter of him after his death. He rebuilt the small church that was located on the site of the later Hagia Sophia, and was an opponent of the Pelagians, which helped increase his popularity among the citizens of Constantinople.