The 2011 Oberstaufen Cup was a professional tennis tournament played on clay courts. It was part of the 2011 ATP Challenger Tour. It was the 20th edition of the tournament. It took place in Oberstaufen, Germany between July 4 and July 10, 2011.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Austria | Andreas Haider-Maurer | 78 | 1 | |
| Simon Greul | 127 | 2 | ||
| Daniel Brands | 139 | 3 | ||
 Slovakia | Martin Kližan | 146 | 4 | |
| Austria | Martin Fischer | 151 | 5 | |
| Andreas Beck | 156 | 6 | ||
 Serbia | Nikola Ćirić | 176 | 7 | |
 Romania | Victor Crivoi | 185 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following player received entry into the singles main draw as a lucky loser:
See main article: 2011 Oberstaufen Cup – Singles. Daniel Brands def. Andreas Beck, 6–4, 7–6(7–3)
See main article: 2011 Oberstaufen Cup – Doubles. Martin Fischer / Philipp Oswald def. 
Tomasz Bednarek / Mateusz Kowalczyk, 7–6(7–1), 6–3
