| Honorific-Prefix: | The Hon. |
| John Ross | |
| Office: | Senator for Ontario |
| Appointed: | Royal Proclamation |
| Term Start: | 1867 |
| Term End: | 1871 |
| Office2: | 2nd Speaker of the Senate of Canada |
| Predecessor2: | Joseph-Édouard Cauchon |
| Successor2: | Joseph-Édouard Cauchon |
| Term Start2: | May 17, 1869 |
| Term End2: | May 26, 1869 |
| Birth Date: | 10 March 1818 |
| Birth Place: | County Antrim, Ireland |
| Death Place: | Toronto, Ontario |
| Party: | Conservative |
John Ross (March 10, 1818 – January 31, 1871) was a Canadian lawyer, politician, and businessman.
Born in County Antrim, Ireland, he was brought to Canada as an infant. Ross married twice, first to Margaret Crawford who died in 1847, secondly to Augusta Elizabeth Baldwin February 4, 1851, the daughter of Robert Baldwin. Ross was president of the Grand Trunk Railway from 1853 to 1862 when he was succeeded by Sir Edward William Watkin. In 1867, he was appointed to the Senate representing the senatorial division of Ontario. A Conservative, the Honourable John Ross served until his death in 1871 in Toronto, Ontario.
Ross' son Robert Baldwin Ross, known as Robbie, had a long-term relationship with Oscar Wilde.