| Stefan Ungerer | |
| Birth Date: | 23 November 1993 |
| Birth Place: | Pietermaritzburg |
| School: | Maritzburg College |
| Position: | Scrum-half |
| Youthyears1: | 2006–2014 |
| Years1: | 2013–2015 |
| Apps1: | 10 |
| Points1: | 10 |
| Years2: | 2014–2016 |
| Apps2: | 17 |
| Points2: | 25 |
| Years3: | 2015–2016 |
| Apps3: | 12 |
| Points3: | 5 |
| Years4: | 2017 |
| Apps4: | 5 |
| Points4: | 15 |
| Years5: | 2017 |
| Apps5: | 3 |
| Points5: | 0 |
| Years6: | 2017–2018 |
| Apps6: | 26 |
| Points6: | 35 |
| Years7: | 2018–2020 |
| Apps7: | 22 |
| Points7: | 40 |
| Years8: | 2021–2022 |
| Apps8: | 23 |
| Points8: | 10 |
| Years9: | 2021– |
| Apps9: | 5 |
| Points9: | 5 |
| Repyears1: | 2013 |
| Repteam1: | South Africa Under-20 |
| Repcaps1: | 4 |
| Reppoints1: | 5 |
| Clubupdate: | 10 July 2022 |
| Repupdate: | 23 April 2018 |
Stefan Ungerer (born 23 November 1993) is a South African rugby union player for the in the Pro14. His regular position is scrum-half.
Ungerer represented the at Under-13, Under-16, Under-19 and Under-21 level in various youth tournaments.
In 2013, he was included in their Vodacom Cup squad and made his provincial first class debut in the 72–6 victory over the .
Ungerer was included in the training group that toured Argentina in preparation for the 2013 IRB Junior World Championship. He was then included in the squad for the 2013 IRB Junior World Championship.