| James E. Hagan | |
| Office: | 21st Mayor of Somerville, Massachusetts |
| Term Start: | January 1, 1934 |
| Term End: | January 6, 1936 |
| Successor: | Leslie E. Knox |
| Office2: | Member of the Massachusetts House of Representatives 23rd Middlesex District |
| Term Start2: | 1927 |
| Term End2: | 1932 |
| Birth Date: | January 25, 1902 |
| Death Date: | November 1965 (aged 63)[1] |
| Nationality: | American |
| Profession: | Salesman |
James E. Hagan (January 25, 1902 – November 1965) was an American businessman and politician who served in the Massachusetts House of Representatives and as the twenty first mayor of Somerville, Massachusetts.
In October 1933, Hagan defeated eleven other candidates to win Somerville's first non-partisan mayoral primary.