| Leon Martin Conwell | |
| Office: | 19th Mayor of Somerville, Massachusetts |
| Term Start: | January 4, 1926 |
| Term End: | January 6, 1930 |
| Predecessor: | John M. Webster |
| Office2: | Member of the Massachusetts House of Representatives 26th Middlesex District |
| Term Start2: | 1910 |
| Term End2: | 1912 |
| Office3: | Member of the Somerville, Massachusetts School Board |
| Term Start3: | 1907 |
| Term End3: | 1908 |
| Birth Date: | April 15, 1870 |
| Death Place: | Somerville, Massachusetts |
| Nationality: | American |
| Spouse: | Sarah Harriet Brewster, m. June 19, 1901. |
| Children: | Agnes Conwell; Charles Brewster Conwell |
| Alma Mater: | Rugby Academy, Philadelphia; Princeton University, A.B. class, of 1892. |
| Profession: | Journalist |
Leon Martin Conwell (April 15, 1870 – August 18, 1953) was an American journalist and politician who served in the Massachusetts House of Representatives and as the nineteenth Mayor, of Somerville, Massachusetts.[1]
Conwell was born April 15, 1870, in Somerville, Massachusetts to Jennie P. (Hayden) Conwell, and Russell H. Conwell.
Conwell was the publisher and editor of the Somerville Journal.