| 2011 Estoril Open | |
|---|---|
| Date | 23 April – 1 May, 2011 |
| Edition | 22nd (ATP) / 15th (WTA) |
| Surface | Clay / outdoor |
| Location | Oeiras, Portugal |
| Venue | Estádio Nacional |
| Champions | |
| Men's singles | |
 Juan Martín del Potro | |
| Women's singles | |
 Anabel Medina Garrigues | |
| Men's doubles | |
 Eric Butorac /  Jean-Julien Rojer | |
| Women's doubles | |
 Alisa Kleybanova /  Galina Voskoboeva | |
The 2011 Estoril Open was a tennis tournament played on outdoor clay courts. It was the 22nd edition of the Estoril Open for the men (the 15th for the women), and was part of the ATP World Tour 250 series of the 2011 ATP World Tour, and of the International-level tournaments of the 2011 WTA Tour. Both the men's and the women's events took place at the Estádio Nacional in Oeiras, Portugal, from 23 April through 1 May 2011.