| Constituency mp | Addington |
|---|---|
| Parliament | Canadian |
| Predecessor | John William Bell |
| Successor | The electoral district was abolished in 1903. |
| Term start | 1902 |
| Term end | 1904 |
| Constituency mp 2 | Frontenac |
| Parliament 2 | Canadian |
| Predecessor 2 | Hiram Augustus Calvin |
| Successor 2 | John Wesley Edwards |
| Term start 2 | 1904 |
| Term end 2 | 1908 |
| Birth date | September 30, 1854 |
| Birth place | Junetown, Escott township, Leeds County, Canada West |
| Death date | June 19, 1939 (aged 84) |
| Party | Conservative |
Melzar Avery (September 30, 1854 – June 19, 1939) was a Canadian politician.
Born in Junetown, Escott township, Leeds County, Canada West, the son of Isaac and Mary Avery, Avery was educated at the public School of Escott. A lumber merchant, he was a member of the County Council of Frontenac for 14 years. He was first elected to the House of Commons of Canada in a 1902 by-election for the Ontario electoral district of Addington. A Conservative, he was re-elected in 1904 for the electoral district of Frontenac. He was defeated in 1908.