The 2011 If Stockholm Open was a professional men's tennis tournament played on indoor hard courts.

It was the 43rd edition of the tournament, which was part of the 2011 ATP World Tour.

It took place at the Kungliga tennishallen in Stockholm, Sweden between 17 and 23 October 2011.

First-seeded Gaël Monfils won the singles title.

Gaël Monfils defeated Jarkko Nieminen, 7–5, 3–6, 6–2 Rohan Bopanna / Aisam-ul-Haq Qureshi defeated Marcelo Melo / Bruno Soares, 6–1, 6–3 The following players received wildcards into the singles main draw: The following players received entry from the qualifying draw: