The 2018 Challenger Banque Nationale de Saguenay was a professional tennis tournament played on indoor hard courts. It was the thirteenth edition of the tournament and was part of the 2018 ITF Women's Circuit. It took place in Saguenay, Quebec, Canada, on 22–28 October 2018.
Singles main draw entrants
Seeds
1 Rankings as of 15 October 2018.
Other entrants
The following players received a wildcard into the singles main draw: Carson Branstine Jada Bui Petra Januskova Alexandra Vagramov
The following players received entry from the qualifying draw: Hayley Carter Jessica Ho Daria Lopatetska Kennedy Shaffer
Champions
Singles
Katherine Sebov def. Quirine Lemoine, 7–6(12–10), 7–6(7–4)
Doubles
Tara Moore / Conny Perrin def. Sharon Fichman / Maria Sanchez, 6–0, 5–7, [10–7]