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.

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: