| Peter Graham | |
| Office1: | Ontario MPP |
| Term Start1: | 1875 |
| Term End1: | 1877 |
| Predecessor1: | Delino Dexter Calvin |
| Successor1: | Delino Dexter Calvin |
| Constituency1: | Frontenac |
| Party: | Conservative |
| Birth Date: | 15 September 1827 |
| Birth Place: | Argyllshire, Scotland |
| Death Place: | Toronto, Ontario |
| Occupation: | Farmer |
| Spouse: | Mary Talbot |
| Children: | 8 |
Peter J. P. Graham (September 15, 1827 - January 18, 1877) was an Ontario farmer and political figure. He represented Frontenac in the Legislative Assembly of Ontario as a Conservative member from 1875 to 1877.
He was born in Argyllshire, Scotland in 1827. He served as reeve for Pittsburgh and Howe Islands in 1871 and warden for Frontenac. He was a captain for the field battery at Kingston.