The 2011 Swiss Indoors was a men's tennis tournament played on indoor hard courts. It was the 42nd edition of the event known that year as the Swiss Indoors, and was part of the 500 series of the 2011 ATP World Tour. It was held at the St. Jakobshalle in Basel, Switzerland, from 31 October through 6 November 2011. Roger Federer won the singles title.
See main article: 2011 Swiss Indoors – Singles. Roger Federer defeated 
Kei Nishikori, 6–1, 6–3
See main article: 2011 Swiss Indoors – Doubles. 
Michaël Llodra / 
Nenad Zimonjić defeated 
Max Mirnyi / 
Daniel Nestor, 6–4, 7–5
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Novak Djokovic | 1 | 1 | ||
| Andy Murray | 3 | 2 | ||
| Roger Federer | 4 | 3 | ||
| Tomáš Berdych | 7 | 4 | ||
| Mardy Fish | 8 | 5 | ||
| Janko Tipsarević | 13 | 6 | ||
| Andy Roddick | 14 | 7 | ||
| Viktor Troicki | 17 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
See main article: 2011 Davidoff Swiss Indoors – Singles qualifying.
The following players received entry from a lucky loser spot:
