| Wiaan Liebenberg | |
| Fullname: | Willem Andries Liebenberg |
| Birth Date: | 31 August 1992 |
| Birth Place: | Brackenfell, South Africa |
| Weight: | 1050NaN0 |
| School: | HTS Drostdy, Worcester |
| University: | University of Pretoria |
| Relatives: | Hanro Liebenberg (brother) |
| Position: | Flanker |
| Currentclub: | La Rochelle |
| Youthyears1: | 2009–2010 |
| Years1: | 2011–2015 |
| Apps1: | 37 |
| Points1: | 65 |
| Years2: | 2014 |
| Apps2: | 1 |
| Points2: | 0 |
| Years3: | 2015–2018 |
| Apps3: | 57 |
| Points3: | 15 |
| Years4: | 2018 |
| Clubs4: | → Béziers (loan) |
| Apps4: | 2 |
| Points4: | 0 |
| Years5: | 2018–2022 |
| Clubs5: | La Rochelle |
| Apps5: | 80 |
| Points5: | 60 |
| Amatyears1: | 2012–present |
| Amatapps1: | 17 |
| Amatpoints1: | 45 |
| Repyears1: | 2012 |
| Repteam1: | South Africa U20 |
| Repcaps1: | 4 |
| Reppoints1: | 0 |
| Clubupdate: | 11 June 2022 |
| Repupdate: | 11 May 2014 |
Willem Andries Liebenberg (born 31 August 1992) is a South African former rugby union player, who mainly played as a flanker for Blue Bulls then Top 14 sides Montpellier and La Rochelle.
He represented the at the Under–18 Academy and Craven Week tournaments in 2009 and 2010 respectively, which led to his inclusion in the South African Under–18 High Performance Squad in 2010.
He also moved to the where he played at Under–19 and Under–21 level. He made his debut for the senior team during the 2012 Vodacom Cup in a match against the .
He captained the side during the 2015 Varsity Cup and named in a Varsity Cup Dream Team at the conclusion of the tournament which played one match against the South Africa Under-20s in Stellenbosch.
Liebenberg was included in and named captain of the South Africa Under-20 squad for the 2012 IRB Junior World Championship. The team went on to win the tournament for the first time.