| Harry Dennison | |
| Fullname: | Harry Dennison |
| Birth Date: | 4 November 1894 |
| Birth Place: | Bradford, England |
| Death Date: | [1] |
| Death Place: | Blackburn, England |
| Height: | [2] |
| Position: | Inside-forward |
| Years1: | 1911–1920 |
| Clubs1: | Blackburn Rovers |
| Caps1: | 3 |
| Goals1: | 0 |
| Years2: | 1921–1922 |
| Clubs2: | Rochdale |
| Caps2: | 33 |
| Goals2: | 17 |
| Years3: | 1922–1923 |
| Clubs3: | Wigan Borough |
| Caps3: | 30 |
| Goals3: | 13 |
| Years4: | 1924–1925 |
| Clubs4: | Stockport County |
| Caps4: | 11 |
| Goals4: | 3 |
Harry Dennison (4 November 1894 – 15 December 1947) was an English footballer who played as a forward for Blackburn Rovers, Rochdale, Wigan Borough and Stockport County.
Dennison made his debut for Blackburn Rovers (against Bristol City) on 8 April 1911, aged 16 years and 155 days old, making him the youngest person to play for the club.[3]