| Date: | 7–13 September |
| Edition: | 14th |
| Surface: | Clay |
| Champd: |  Ilija Bozoljac /  Flavio Cipolla |
The 2015 Banja Luka Challenger was a professional tennis tournament played on clay courts. It was the fourteenth edition of the tournament which was part of the 2015 ATP Challenger Tour. It took place in Banja Luka, Bosnia and Herzegovina from 14 to 20 September 2015.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Spain | Daniel Gimeno Traver | 76 | 1 | |
| Serbia | Dušan Lajović | 109 | 3 | |
 Argentina | Horacio Zeballos | 148 | 4 | |
| Tobias Kamke | 172 | 5 | ||
| Serbia | Laslo Đere | 180 | 6 | |
 France | Calvin Hemery | 203 | 7 | |
| France | Mathias Bourgue | 210 | 8 |
Marcel Granollers, who was set as 2nd seed withdrew, due to right hip injury.The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following players received entry as lucky losers:
Nicola Ghedin Jérôme InzerilloSee main article: 2015 Banja Luka Challenger – Singles.
Dušan Lajović def. 
Victor Hănescu || 7-6(7–5), 7-6(7–5)See main article: 2015 Banja Luka Challenger – Doubles.
Ilija Bozoljac / Flavio Cipolla def. 
Jaroslav Pospíšil / Jan Šátral, 6–2, 7–5