| Thomas McGarry | |
| Office: | Ontario MPP |
| Term Start: | 1905 |
| Term End: | 1919 |
| Predecessor: | Francis Robert Latchford |
| Successor: | John Carty |
| Constituency: | Renfrew South |
| Party: | Conservative |
| Birth Date: | 19 August 1871 |
| Birth Place: | Drummond Township, Lanark County, Ontario |
| Death Place: | Toronto, Ontario |
Thomas William McGarry (1871-1935) was a Canadian politician. He served as a Conservative Member of the Legislative Assembly of Ontario for Renfrew South from 1905 to 1919, and as provincial treasurer from 1914 to 1919.[1] He was born to Thomas McGarry and Mary Dowdall.[2] He died in 1935.[3]