The 2009 If Stockholm Open was a men's tennis tournament played on indoor hard courts.

It was the 41st edition of the event known that year as the If Stockholm Open, and was part of the ATP World Tour 250 Series of the 2009 ATP World Tour.

It was held at the Kungliga tennishallen in Stockholm, Sweden, from 17 October through 25 October 2009.

Unseeded Marcos Baghdatis won the singles title.

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 a Lucky loser: Marcos Baghdatis defeated Olivier Rochus, 6–1, 7–5 Bruno Soares / Kevin Ullyett defeated Simon Aspelin / Paul Hanley, 6–4, 7–6(7–4)