The 2015 Porsche Tennis Grand Prix was a women's tennis tournament played on indoor clay courts. It was the 38th edition of the Porsche Tennis Grand Prix, and part of the Premier tournaments of the 2015 WTA Tour. It took place at the Porsche Arena in Stuttgart, Germany, from 20 April through 26 April 2015. Unseeded Angelique Kerber won the singles title.
| Event | W | F | SF | QF | Round of 16 | Round of 32 | width=85 | Q | width=85 | Q3 | width=85 | Q2 | width=85 | Q1 |
| Singles | 470 | 305 | 185 | 100 | 55 | 1 | 25 | 18 | 13 | 1 | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubles | 1 |
| Event | W | F | SF | QF | Round of 16 | Round of 32 | width=85 | Q3 | width=85 | Q2 | width=85 | Q1 |
| Singles | $124,000 | $66,000 | $35,455 | $19,050 | $10,220 | $5,580 | $2,920 | $1,555 | $860 | |||
| Doubles * | $39,000 | $20,650 | $11,360 | $5,875 | $3,140 |
The following players received wildcards into the main draw:
The following players received entry from the qualifying draw:
The following players received entry as lucky losers:
Eugenie Bouchard →replaced by 
Madison Brengle
Jelena Janković (right foot injury) →replaced by Alexa Glatch
Svetlana Kuznetsova (left adductor) →replaced by 
Alberta Brianti
Peng Shuai →replaced by 
Zarina Diyas Marina Melnikova| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
| Martina Hingis |  India | Sania Mirza | 5 | 1 | ||
 France | Caroline Garcia | Katarina Srebotnik | 43 | 2 | ||
| United States | Bethanie Mattek-Sands |  Czech Republic | Lucie Šafářová | 49 | 3 | |
 Poland | Klaudia Jans-Ignacik | Andreja Klepač | 72 | 4 |
The following pairs received wildcards into the main draw:
See main article: 2015 Porsche Tennis Grand Prix – Singles.
See main article: 2015 Porsche Tennis Grand Prix – Doubles.
Bethanie Mattek-Sands / Lucie Šafářová defeated Caroline Garcia / Katarina Srebotnik, 6–4, 6–3
Romania
Spain