| Jack Hartley | |
| Birth Name: | Arthur James Harley |
| Birth Date: | 18 August 1873 |
| Birth Place: | Krugersdorp, South African Republic |
| Ru Position: | Wing |
| Repteam1: | South Africa |
| Repyears1: | 1891 |
| Repcaps1: | 1 |
| Reppoints1: | 0 |
| Ru Ntupdate: | 19 July 2010 |
| Ru Province1: | Western Province |
| Ru Provinceapps1: | 0 |
| Ru Provincepoints1: | 0 |
Jack Hartley also known as Arthur James Hartley[1] (18 August 1873 – 15 May 1923) was a South African international rugby union player who played as a wing. [2]
He made his only international appearance for South Africa in their Test—against Great Britain. He remains the youngest ever player to represent South Africa at international level.[3]