The 2011 Kremlin Cup was a tennis tournament played on indoor hard courts.

It was the 22nd edition of the Kremlin Cup for the men (16th edition for the women) and was part of the ATP World Tour 250 Series of the 2011 ATP World Tour, and of the Premier Series of the 2011 WTA Tour.

It was held at the Olympic Stadium in Moscow, Russia, from 15 October through 23 October 2011.

Janko Tipsarević and Dominika Cibulková won the singles title.

The following players received wildcards into the singles main draw: The following players have received the entry from the qualifying draw: The following players received wildcards into the singles main draw: The following players received entry from the qualifying draw: The following players received entry from a lucky loser spot: Janko Tipsarević defeated Viktor Troicki, 6–4, 6–2 Dominika Cibulková defeated Kaia Kanepi, 3–6, 7–6(7–1), 7–5 František Čermák / Filip Polášek defeated Carlos Berlocq / David Marrero, 6–3, 6–1 Vania King / Yaroslava Shvedova defeated Anastasia Rodionova / Galina Voskoboeva, 7–6(7–3), 6–3