| Stefanie Birkelbach | |
| Birth Date: | 13 July 1964 |
| Birth Place: | Balderschwang, West Germany |
| Seasons: | 1 – (1988) |
| Totalpodiums: | 0 |
| Teampodiums: | 0 |
| Individual Starts: | 3 |
| Team Starts: | 1 |
Sonja Bilgeri (born 13 July 1964) is a German former cross-country skier. She competed in four events at the 1988 Winter Olympics.[1]