| Rainer Groß | |
| Nationality: | German |
| Sport: | Cross-country skiing |
| Birth Date: | 18 June 1947 |
| Birth Place: | Wünschendorf/Elster, Soviet occupation zone in Germany |
Rainer Groß (born 18 June 1947) is a German cross-country skier. He competed in the men's 15 kilometre event at the 1972 Winter Olympics.[1]