The 2011 Košice Open was a professional tennis tournament played on outdoor red clay courts.

It was part of the 2011 ATP Challenger Tour.

It took place in Košice, Slovakia between 6 and 12 June 2011.

The following players received wildcards into the singles main draw: The following players received entry into the singles main draw as a special exemption: The following players received entry from the qualifying draw: Simon Greul def.

Victor Crivoi, 6–2, 6–1 Simon Greul / Bastian Knittel def.