Daniel Augustus Joseph Sullivan (July 31, 1884 – January 27, 1941) was a United States Naval Reserve officer and a recipient of the United States military's highest decoration—the Medal of Honor—for his actions in World War I. Sullivan attended Clemson College and graduated as part of the Class of 1902.

On May 21, 1918, while serving as an officer of the USS Christabel (SP-162), he secured several live depth charges that had come loose during combat with a German U-boat.

Promoted to Lieutenant in September 1918, he served with the U.S. Navy Headquarters in London, England, during the months following the November 1918 armistice.

He attained the rank of Lieutenant Commander before leaving the Naval Reserve Force.

Sullivan immediately fell on the depth charges and succeeded in securing them, thus saving the ship from disaster, which would inevitably have caused great loss of life.