The 2012 Košice Open was a professional tennis tournament played on clay courts. It was the tenth edition of the tournament which was part of the 2012 ATP Challenger Tour. It took place in Košice, Slovakia between 11 and 17 June 2012.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Italy | Alessandro Giannessi | 126 | 1 | |
 Czech Republic | Jan Hájek | 128 | 2 | |
| João Sousa | 137 | 3 | ||
 Slovenia | Aljaž Bedene | 138 | 4 | |
 France | Augustin Gensse | 143 | 5 | |
 Austria | Andreas Haider-Maurer | 155 | 6 | |
| Yang Tsung-hua | 167 | 7 | ||
 Spain | Arnau Brugués-Davi | 178 | 8 |
The following players received wildcards into the singles main draw:
Patrik Fabian Dominik Hrbatý Miloslav Mečíř Jr. Jiří VeselýThe following players received entry from the qualifying draw:
See main article: 2012 Košice Open – Singles.
Aljaž Bedene def. Simon Greul, 7–6(7–1), 6–2See main article: 2012 Košice Open – Doubles.
Tomasz Bednarek / Mateusz Kowalczyk def. 
Uladzimir Ignatik / Andrei Vasilevski, 2–6, 7–5, [14–12]