| 2009 WTA Tour Championships | |
|---|---|
 | |
| Date | October 27 – November 1 |
| Edition | 39th (singles) / 34th (doubles) |
| Location | Doha, Qatar |
| Venue | Khalifa International Tennis Complex |
| Champions | |
| Singles | |
 Serena Williams | |
| Doubles | |
 Nuria Llagostera Vives María José Martínez Sánchez | |
The 2009 WTA Tour Championships (also known as Sony Ericsson Championships – Doha 2009) was held in Doha, Qatar from October 27 to November 1. It was the second time the Khalifa International Tennis Complex hosted the WTA Tour Year-End Singles and Doubles Championships.
Women's Tennis Association(WTA) rank No. 2 Serena Williams won her second year-end championships title, defeating sister, Venus Williams in the final 6–2, 7–6(4). The Spanish duo of Nuria Llagostera Vives and María José Martínez Sánchez won the doubles event on their debut 7–6(0), 5–7, [10-7]. They defeated the World No. 1s in doubles and defending champions, Cara Black and Liezel Huber, in the final.