| Donald Robert McDonald | |
| Office1: | Ontario MPP |
| Term Start1: | 1908 |
| Term End1: | 1911 |
| Predecessor1: | John Angus McMillan |
| Successor1: | Hugh Munro |
| Term Start2: | 1898 |
| Term End2: | 1902 |
| Predecessor2: | David Murdoch MacPherson |
| Successor2: | William Duncan McLeod |
| Constituency2: | Glengarry |
| Party: | Conservative |
| Birth Date: | 11 December 1856 |
| Birth Place: | Wisconsin, United States |
| Death Place: | Alberta, Canada |
| Occupation: | Farmer |
| Spouse: | |
Donald Robert McDonald (December 11, 1856 - 1923) was a contractor, farmer and politician in Ontario. He represented Glengarry from 1898 to 1902 and from 1908 to 1911 in the Legislative Assembly of Ontario as a Conservative.
The son of D.D. McDonald, he was born in Wisconsin and was educated in Williamstown. He was married twice: first to Catherine McDonell in 1887 and then to Mary Isabella Chisholm around 1899. McDonald served as deputy reeve of Charlottenburgh township.[1] He defeated David Murdoch McPherson to win a seat in the provincial assembly in 1898. McDonald ran unsuccessfully for the Glengarry seat in the Canadian House of Commons in 1904, losing to Jacob Schell. After completing his second term in the Ontario assembly, he moved to Alberta and died there[2] in 1923.[3]