The 2011 Banja Luka Challenger was a professional tennis tournament played on clay courts. It was the tenth edition of the tournament which was part of the 2011 ATP Challenger Tour. It took place in Banja Luka, Bosnia and Herzegovina between 12 and 18 September 2011.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Spain | Pere Riba | 70 | 1 | |
 Slovenia | Blaž Kavčič | 80 | 2 | |
| Spain | Daniel Gimeno Traver | 89 | 3 | |
 Italy | Flavio Cipolla | 108 | 4 | |
| Slovenia | Grega Žemlja | 122 | 5 | |
 Czech Republic | Jaroslav Pospíšil | 126 | 6 | |
| Spain | Rubén Ramírez Hidalgo | 134 | 7 | |
| Spain | Pablo Carreño Busta | 167 | 8 |
The following players received wildcards into the singles main draw:
Mirza Bašić
Ivan Bjelica Tomislav Brkić
Goran TošićThe following players received entry from the qualifying draw:
Nikola ČačićSee main article: 2011 Banja Luka Challenger – Singles. Blaž Kavčič def. Pere Riba, 6–4, 6–1
See main article: 2011 Banja Luka Challenger – Doubles. Marco Crugnola / Rubén Ramírez Hidalgo def. Jan Mertl / Matwé Middelkoop, 7–6(7–3), 3–6, [10–8]