| Cobus Grobler | |
| Birth Name: | Petrus Jacobus Johannes Grobbelaar |
| Birth Date: | 1981 5, df=yes |
| Birth Place: | Randfontein, South Africa |
| Weight: | 97kg (214lb) |
| Ru Position: | Flank |
| Super1: | Cats / Lions |
| Superyears1: | 2004–2012 |
| Superapps1: | 94 |
| Superpoints1: | 55 |
| Super14update: | 16 July 2012 |
| Ru Province1: | Golden Lions |
| Ru Provinceyears1: | 2003–2012 |
| Ru Provinceapps1: | 113 |
| Ru Provincepoints1: | 50 |
| Ru Provinceupdate: | 21 October 2012 |
| School: | Jan Viljoen High School |
| University: | RAU |
Cobus Grobbelaar (born 27 May 1981) is a former South African rugby union footballer. His regular playing position was flanker. He represented the Lions in Super Rugby and the Golden Lions in the Currie Cup until his retirement in 2012.