| Robert Adam Campbell | |
| Office: | Ontario MPP |
| Term Start: | 1894 |
| Term End: | 1899 |
| Predecessor: | John Francis Dowling |
| Successor: | Francis Robert Latchford |
| Constituency: | Renfrew South |
| Party: | Liberal |
| Profession: | Lumber merchant |
Robert Adam Campbell was an Ontario businessman and political figure. He represented Renfrew South in the Legislative Assembly of Ontario from 1894 to 1899 as a Liberal member.
He was the son of Robert Campbell, who represented the same riding in the House of Commons. Campbell was a lumber merchant in Eganville.