| 2018 Under-21 Provincial Championship | |
|---|---|
| Countries | South Africa |
| Date | 25 August – 27 October 2018 |
| Champions | Golden Lions U21 |
| Runners-up | Blue Bulls U21 |
| Matches played | 24 |
| Tries scored | 278 (average 11.6 per match) |
| Top point scorer | Lubabalo Dobela, Free State U21 (101) |
| Top try scorer | Courtney Winnaar, Sharks U21 (8) |
The 2018 Under-21 Provincial Championship was the 2018 edition of the Under-21 Provincial Championship, an annual national Under-21 rugby union competition held in South Africa, and was contested from 25 August to 27 October 2018.
The competition was won by Golden Lions U21, who beat Blue Bulls U21 58–24 in the final played on 27 October 2018.