| Date: | 29 October–4 November |
| Edition: | 14th |
| Category: | ITF Women's Circuit |
| Location: | Toronto, Canada |
| Surface: | Hard / Indoor |
| Prize Money: | $60,000 |
| Champs: | Quirine Lemoine |
| Champd: |  Sharon Fichman /  Maria Sanchez |
The 2018 Tevlin Women's Challenger was a professional tennis tournament played on indoor hard courts. It was the fourteenth edition of the tournament and was part of the 2018 ITF Women's Circuit. It took place in Toronto, Canada, on 29 October–4 November 2018.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Ukraine | Kateryna Kozlova | 106 | 1 | |
| Conny Perrin | 134 | 2 | ||
| Richèl Hogenkamp | 159 | 3 | ||
| Elitsa Kostova | 200 | 4 | ||
 United Kingdom | Naomi Broady | 204 | 5 | |
 France | Jessika Ponchet | 221 | 6 | |
| Canada | ||||
| Canada | Bianca Andreescu | 243 | 8 |
The following players received a wildcard into the singles main draw:
Ariana Arseneault Louise Kwong Catherine LeducThe following player received entry using a protected ranking:
The following player received entry as a special exempt:
Daria LopatetskaThe following players received entry from the qualifying draw:
Andreea Ghițescu Nadja Gilchrist The following players received entry as lucky losers:
Alexandra Damaschin Tori Kinard Pamela MontezSee main article: 2018 Tevlin Women's Challenger – Singles.
Kateryna Kozlova, 6–2, 6–3See main article: 2018 Tevlin Women's Challenger – Doubles.
Sharon Fichman / Maria Sanchez def. 
Maja Chwalińska / Elitsa Kostova, 6–0, 6–4