| John Hornby | |
| Office: | Member of Parliament for Blackburn |
| Term Start: | 30 July 1841 |
| Term End: | 8 July 1852 |
| Alongside: | James Pilkington (1847–1852) William Feilden (1841–1847) |
| Predecessor: | William Feilden William Turner |
| Successor: | James Pilkington William Eccles |
| Birth Date: | 19 August 1810 |
| Birth Place: | Blackburn,Lancashire,England |
| Nationality: | British |
| Party: | Conservative |
John Hornby (19 August 1810 – 5 December 1892) was a British Conservative politician.
Hornby was elected Conservative MP for Blackburn at the 1841 general election and held the seat until 1852.[1]