| RJ Liebenberg | |
| Birth Date: | 11 December 1990 |
| Birth Place: | Bethlehem, South Africa |
| Weight: | 1000NaN0 |
| School: | Hoërskool Voortrekker, Bethlehem |
| University: | University of Johannesburg |
| Position: | Flanker / Number Eight |
| Youthyears1: | 2006–2008 |
| Youthyears2: | 2009–2011 |
| Years1: | 2011 |
| Apps1: | 1 |
| Points1: | 0 |
| Years2: | 2013–2017 |
| Apps2: | 63 |
| Points2: | 5 |
| Amatyears1: | 2012–2013 |
| Amatapps1: | 13 |
| Amatpoints1: | 0 |
| Repyears1: | 2013 |
| Repteam1: | South African Universities |
| Repcaps1: | 1 |
| Reppoints1: | 0 |
| Clubupdate: | 9 October 2016 |
RJ Liebenberg (born 11 December 1990 in Bethlehem) is a South African rugby union player who most recently played for . His regular position is eighth man or flanker.
Liebenberg started his career playing at youth level for the . He represented them at the Under–16 Grant Khomo Week in 2006, as well as the Under–18 Craven Week tournaments in 2007 and 2008 before playing for the side in the 2008 Under-19 Provincial Championship competition.
He then moved to Johannesburg, where he played his rugby for the ; at Under–19 level in 2009 and at Under–21 level in 2010 and 2011. He also played for university side in the 2012 and 2013 Varsity Cup competitions.
His first class debut for the came in a compulsory friendly match against the prior to the 2011 Currie Cup Premier Division, which turned out to be his only appearance for the team.
His performances in the 2013 Varsity Cup resulted in him being called into the squad for the 2013 Currie Cup Premier Division. He made his debut for them in their 9–15 loss to the .