| Wilmar Arnoldi | |
| Birth Date: | 21 October 1994 |
| Birth Place: | Pretoria, South Africa |
| School: | Hoërskool Ermelo, Ermelo |
| University: | University of Pretoria |
| Position: | Hooker |
| Youthyears1: | 2012 |
| Youthyears2: | 2013 |
| Youthyears3: | 2014–2015 |
| Years1: | 2015 |
| Apps1: | 3 |
| Points1: | 5 |
| Years2: | 2015–2016 |
| Apps2: | 21 |
| Points2: | 25 |
| Years3: | 2017–2019 |
| Apps3: | 29 |
| Points3: | 35 |
| Years4: | 2019–2022 |
| Apps4: | 10 |
| Points4: | 15 |
| Years5: | 2020–2022 |
| Apps5: | 5 |
| Points5: | 15 |
| Years6: | 2022 |
| Clubs6: | → |
| Apps6: | 1 |
| Points6: | 0 |
| Years7: | 2022– |
| Clubupdate: | 10 July 2022 |
Wilmar Arnoldi (born 21 October 1994) is a South African rugby union player for the in the Pro14. His regular position is hooker.