The 2009 Interwetten Austrian Open Kitzbühel is a men's tennis tournament played on outdoor clay courts.

It is the 29th edition of the tournament and was part of the World Tour 250 series of the 2009 ATP World Tour.

It was held at the Tennis Stadium Kitzbühel in Kitzbühel Austria from 16 May until 23 May 2009.

Unseeded Guillermo García López won the singles title.

The following players received wildcards into the main draw: The following players received entry from the qualifying draw: Guillermo García López defeated Julien Benneteau, 3–6, 7–6(7–1), 6–3 Marcelo Melo / André Sá defeated Andrei Pavel / Horia Tecău, 6–7(9–11), 6–2, [10–7]