John Callan O'Laughlin (January 11, 1873 – March 14, 1949) was a journalist and longtime publisher of the Army and Navy Journal.

[1] John Callan O'Laughlin was born in Washington, D.C., on January 11, 1873.

[2] He served as United States Assistant Secretary of State from January 28, 1909, to March 5, 1909.

[3] He died at Walter Reed General Hospital on March 14, 1949.

[4]