Family name Groessbacher (Groessbacher 
) , all over the world, is a very rare surname. The surname Groessbacher is characteristic of Western Europe, particularly Austria, where it is quite a rare surname, and Germany, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Groessbacher | Germany, Austria |
Grössbacher, and Größbacher