| Date: | 14–20 May |
| Edition: | 22nd |
| Category: | ITF Women's Circuit |
| Location: | Saint-Gaudens, France |
| Surface: | Clay |
| Prize Money: | $60,000 |
| Champs: |  Vera Lapko |
| Champd: |  Naiktha Bains /  Francesca Di Lorenzo |
| Main Name: | Open Saint-Gaudens Occitanie |
The 2018 Engie Open Saint-Gaudens Occitanie was a professional tennis tournament played on outdoor clay courts. It was the twenty-second edition of the tournament and was part of the 2018 ITF Women's Circuit. It took place in Saint-Gaudens, France, on 14–20 May 2018.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Belarus | Vera Lapko | 92 | 1 | |
| Arantxa Rus | 107 | 2 | ||
 France | Océane Dodin | 110 | 3 | |
| Richèl Hogenkamp | 122 | 4 | ||
| Viktoriya Tomova | 144 | 5 | ||
| Patty Schnyder | 151 | 6 | ||
| Australia | Olivia Rogowska | 153 | 7 | |
 Japan | Misaki Doi | 161 | 8 |
The following players received a wildcard into the singles main draw:
The following player received entry using a protected ranking:
The following players received entry from the qualifying draw:
Kimberly Birrell Priscilla Heise
Yana Sizikova Harmony TanSee main article: 2018 Engie Open Saint-Gaudens Occitanie – Singles.
Vera Lapko def. Quirine Lemoine, 6–2, 6–4 Naiktha Bains / Francesca Di Lorenzo def. Manon Arcangioli / Shérazad Reix, 6–4, 1–6, [11–9]