| Robert John Patterson | |
| Parliament: | Ontario Provincial |
| Term Start: | June 25, 1923 |
| Term End: | October 18, 1926 |
| Predecessor: | Frederick George Sandy |
| Successor: | Frederick George Sandy |
| Riding: | Victoria South |
| Party: | Conservative |
Robert John Patterson was a Canadian politician from the Conservative Party of Ontario. He represented Victoria South in the Legislative Assembly of Ontario from 1923 to 1926.[1]