John Davis Long (1838–1915) was a U.S. political figure. He served as the governor of Massachusetts between 1880 and 1883. He later served as the Secretary of the Navy from 1897 to 1902.
| Preceded by: Hilary A. Herbert |
United States Secretary of the Navy | Succeeded by: William H. Moody |
| Preceded by: Thomas Talbot |
Governor of Massachusetts | Succeeded by: Benjamin Franklin Butler |