John Callan O'Laughlin (January 11, 1873 – March 14, 1949) was a journalist and longtime publisher of the Army and Navy Journal.
John Callan O'Laughlin was born in Washington, D.C., on January 11, 1873.
He served as United States Assistant Secretary of State from January 28, 1909, to March 5, 1909.
He died at Walter Reed General Hospital on March 14, 1949.