The 2013 If Stockholm Open was a professional men's tennis tournament played on indoor hard courts.

It was the 45th edition of the tournament, and part of the ATP World Tour 250 series of the 2013 ATP World Tour.

It took place at the Kungliga tennishallenin Stockholm, Sweden between 14 and 20 October 2013.

The following players received wildcards into the singles main draw: The following players received entry from the qualifying draw: The following pairs received wildcards into the doubles main draw: The following pair received entry as alternates: