| Date: | 2–8 November |
| Edition: | 13th |
| Category: | ITF Women's Circuit |
| Location: | Nantes, France |
| Surface: | Hard / Indoor |
| Prize Money: | $50,000 |
| Champs: |  Mathilde Johansson |
| Champd: |  Lenka Kunčíková / Karolína Stuchlá |
| Before Name: | Open GDF Suez Nantes Atlantique |
The 2015 Engie Open Nantes Atlantique was a professional tennis tournament played on indoor hard courts. It was the thirteenth edition of the tournament and part of the 2015 ITF Women's Circuit, offering a total of $50,000 in prize money. It took place in Nantes, France, on 2–8 November 2015.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Anna-Lena Friedsam | 93 | 1 | ||
| Czech Republic | Kateřina Siniaková | 97 | 2 | |
 Romania | Andreea Mitu | 99 | 3 | |
| Anastasija Sevastova | 112 | 4 | ||
| Czech Republic | Kristýna Plíšková | 115 | 5 | |
 United States | Louisa Chirico | 123 | 6 | |
| France | Pauline Parmentier | 133 | 7 | |
 Russian Federation | Alexandra Panova | 134 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following player received entry by a lucky loser spot:
The following player received entry by a junior exempt:
See main article: 2015 Engie Open Nantes Atlantique – Singles.
Mathilde Johansson def. Andreea Mitu, 6–3, 6–4See main article: 2015 Engie Open Nantes Atlantique – Doubles.
Lenka Kunčíková / Karolína Stuchlá def. Kateřina Siniaková / Renata Voráčová, 6–4, 6–2