| John A. Canavan | |
| Birth Date: | 3 August 1896[1] |
| Birth Place: | Boston, Massachusetts |
| Death Date: | [2] |
| Death Place: | Winthrop, Massachusetts |
| Nationality: | American |
| Occupation: | Attorney |
| Title1: | United States Attorney for the District of Massachusetts |
| Term Start1: | 1938 |
| Term End1: | 1939 |
| Predecessor1: | Francis Ford |
| Successor1: | Edmund J. Brandon |
John Aloysius Canavan (August 3, 1896 – October 2, 1963) was an American attorney who served as the United States Attorney for the District of Massachusetts from 1938 to 1939.[3]