The 2015 Bank of the West Classic was a professional tennis tournament played on hard courts. It was the 44th edition of the tournament, which was part of the WTA Premier tournaments of the 2015 WTA Tour, making it the longest-running women's only tennis tournament.[1] It took place in Stanford, California, United States between 3 and 9 August 2015. It was the first women's event on the 2015 US Open Series.
| Event | W | F | SF | QF | Round of 16 | Round of 32 | Round of 64 | width=85 | Q | width=85 | Q2 | width=85 | Q1 |
| Women's singles | 470 | 305 | 185 | 100 | 55 | 30 | 1 | 25 | 13 | 1 | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Women's doubles | 1 |
| width=130 bgcolor=dfe2e9 | Event | width=80 bgcolor=lime | W | width=85 bgcolor=thistle | F | width=85 bgcolor=ffff00 | SF | width=85 bgcolor=ffebcd | QF | width=85 bgcolor=afeeee | Round of 16 | width=85 bgcolor=afeeee | Round of 32 | width=85 | Q2 | width=85 | Q1 |
| style=background:#ededed | Women's singles | $124,000 | $66,000 | $35,455 | $19,050 | $10,220 | $5,580 | $2,920 | $1,555 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| style=background:#ededed | Women's doubles | $39,000 | $20,650 | $11,360 | $5,875 | $3,140 |
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Caroline Wozniacki | 5 | 1 | ||
 Poland | Agnieszka Radwańska | 7 | 2 | |
 Spain | Carla Suárez Navarro | 10 | 3 | |
 Czech Republic | Karolína Plíšková | 12 | 4 | |
| Angelique Kerber | 13 | 5 | ||
| Andrea Petkovic | 16 | 6 | ||
| Madison Keys | 18 | 7 | ||
 Ukraine | Elina Svitolina | 20 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
Garbiñe Muguruza → replaced by Tatjana Maria Kateřina Siniaková → replaced by Ajla Tomljanović
Serena Williams → replaced by 
Aleksandra Krunić| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
| Chan Hao-ching | Chan Yung-jan | 55 | 1 | |||
| Spain | Anabel Medina Garrigues | Spain | Arantxa Parra Santonja | 66 | 2 | |
 Canada | Gabriela Dabrowski | Poland | Alicja Rosolska | 84 | 3 | |
| Raquel Kops-Jones | Maria Sanchez | 94 | 4 |
The following pair received wildcards into the main draw:
See main article: article and 2015 Bank of the West Classic – Singles.
Karolína Plíšková, 6–3, 5–7, 6–4See main article: article and 2015 Bank of the West Classic – Doubles.
Xu Yifan / Zheng Saisai defeated Anabel Medina Garrigues / Arantxa Parra Santonja, 6–1, 6–3