| Justin Nel | |
| Fullname: | Justin Alastair Nel |
| Birth Date: | 14 February 1987 |
| Birth Place: | Windhoek, Namibia |
| Weight: | 800NaN0 |
| School: | Jan Möhr High School |
| University: | IITC Institute of Information and Technology |
| Position: | Fullback |
| Years1: | 2011 |
| Apps1: | 5 |
| Points1: | 0 |
| Years2: | 2015–present |
| Apps2: | 23 |
| Points2: | 26 |
| Repyears1: | 2010 |
| Repteam1: | Namibia national rugby sevens team |
| Repyears2: | 2012–2016 |
| Repcaps2: | 10 |
| Reppoints2: | 20 |
| Clubupdate: | 22 July 2018 |
| Repupdate: | 26 August 2016 |
Justin Alastair Nel (born 14 February 1987) is a Namibian rugby union player for the Namibia national team and the in the Currie Cup and the Rugby Challenge. His regular position is fullback.
Nel was born in Windhoek (then in South-West Africa, but part of modern-day Namibia). He played rugby sevens for Namibia, representing them at the 2010 South Africa Sevens. He made five appearances for the in the 2011 Vodacom Cup before they withdrew from the competition due to financial constraints.
He made his test debut for in 2012 against and represented the in the South African domestic Currie Cup and Vodacom Cup since their return to the competitions in 2015.