The 2012 Swiss Indoors was a tennis tournament that was played on indoor hard courts. It was the 43rd edition of the event known that year as the Swiss Indoors, and was part of the 500 series of the 2012 ATP World Tour. It was held at the St. Jakobshalle in Basel, Switzerland, from 22 October until 28 October 2012. Second-seeded Juan Martín del Potro won the singles title.
See main article: 2012 Swiss Indoors – Singles. 
Juan Martín del Potro defeated Roger Federer, 6–4, 6–7(5–7), 7–6(7–3)
See main article: 2012 Swiss Indoors – Doubles. 
Daniel Nestor / 
Nenad Zimonjić defeated Treat Conrad Huey / 
Dominic Inglot, 7–5, 6–7(4–7), [10–5]
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Roger Federer | 1 | 1 | ||
| Juan Martín del Potro | 8 | 2 | ||
| Richard Gasquet | 13 | 3 | ||
| Stanislas Wawrinka | 17 | 4 | ||
| Andreas Seppi | 25 | 5 | ||
| Mikhail Youzhny | 27 | 6 | ||
| Florian Mayer | 28 | 7 | ||
| Viktor Troicki | 29 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
Rafael Nadal (left knee injury)
Kei Nishikori (ankle injury)[1] Andy Murray| Country | Player | Rank1 | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|---|
| Canada | Daniel Nestor | 3 | Serbia | Nenad Zimonjić | 3 | 1 | |
 India | Mahesh Bhupathi | 16 | India | Rohan Bopanna | 10 | 2 | |
 Pakistan | Aisam-ul-Haq Qureshi | 11 | Jean-Julien Rojer | 15 | 3 | ||
 Poland | Mariusz Fyrstenberg | 13 | Poland | Marcin Matkowski | 14 | 4 |
The following teams received wildcards into the doubles main draw:
