| Date: | 22–28 July 2019 |
| Edition: | 26th (men) 9th (women) |
| Surface: | Hard |
| Location: | Granby, Quebec, Canada |
| Category: | ATP Challenger Tour ITF Women's World Tennis Tour |
| Prize Money: | $81,240 (men) $80,000 (women) |
| Champms: |  Ernesto Escobedo |
| Champmd: |  André Göransson / Sem Verbeek |
| Champws: |  Lizette Cabrera |
| Champwd: |  Haruka Kaji / Junri Namigata |
| Main Name: | Challenger de Granby |
| After Year: | 2022 |
| After Name: | Championnats Banque Nationale de Granby |
The 2019 Challenger Banque Nationale de Granby was a professional tennis tournament played on outdoor hard courts. It was the twenty-sixth (men) and ninth (women) editions of the tournament which was part of the 2019 ATP Challenger Tour and the 2019 ITF Women's World Tennis Tour. It took place in Granby, Quebec, Canada between 22 and 28 July 2019.[1]
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Slovakia | Norbert Gombos | 133 | 1 | |
 Canada | Peter Polansky | 143 | 2 | |
| Japan | Yasutaka Uchiyama | 168 | 3 | |
| Canada | Vasek Pospisil | 186 | 4 | |
 France | Maxime Janvier | 194 | 5 | |
| France | Enzo Couacaud | 201 | 6 | |
| Australia | Andrew Harris | 204 | 7 | |
| Australia | ||||
| Canada | Steven Diez | 215 | 9 | |
 China | Li Zhe | 220 | 10 | |
| Japan | Yosuke Watanuki | 223 | 11 | |
| Australia | Akira Santillan | 226 | 12 | |
| Japan | Hiroki Moriya | 230 | 13 | |
| Japan | Kaichi Uchida | 243 | 14 | |
| Australia | Maverick Banes | 248 | 15 | |
 Serbia | Danilo Petrović | 250 | 16 |
The following players received wildcards into the singles main draw:
Taha Baadi Justin Boulais Brandon Holt Nicaise Muamba Vasek PospisilThe following players received entry into the singles main draw as alternates:
The following players received entry into the singles main draw using their ITF World Tennis Ranking:
Jordi Arconada
Evan Hoyt Alexander Lebedev
Skander Mansouri
Yannick Mertens Issei Okamura Joshua PeckThe following players received entry from the qualifying draw:
Kooros Ghasemi Hunter Reese| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Japan | Nao Hibino | 130 | 1 | |
| Canada | Rebecca Marino | 143 | 2 | |
| Francesca Di Lorenzo | 153 | 3 | ||
| Sachia Vickery | 163 | 4 | ||
| France | ||||
| Canada | Katherine Sebov | 219 | 6 | |
| Australia | Maddison Inglis | 238 | 7 | |
| Australia | ||||
| Japan | Risa Ozaki | 253 | 9 | |
| Japan | Momoko Kobori | 259 | 10 |
The following players received wildcards into the singles main draw:
Françoise Abanda Carson Branstine Petra Januskova Carol ZhaoThe following players received entry from the qualifying draw:
Ariana Arseneault
Andreea Ghițescu
Nika Kukharchuk Anna Morgina Ingrid Neel
Erin RoutliffeThe following player received entry as a Lucky Loser:
See main article: 2019 Challenger Banque Nationale de Granby – Men's singles.
Ernesto Escobedo def. Yasutaka Uchiyama 7–6(7–5), 6–4.See main article: 2019 Challenger Banque Nationale de Granby – Women's singles.
Lizette Cabrera def. Leylah Annie Fernandez, 6–1, 6–4See main article: 2019 Challenger Banque Nationale de Granby – Men's doubles.
André Göransson / Sem Verbeek def. Li Zhe / Hugo Nys 6–2, 6–4.See main article: 2019 Challenger Banque Nationale de Granby – Women's doubles.
Haruka Kaji / Junri Namigata def. Quinn Gleason / Ingrid Neel, 7–6(7–5), 5–7, [10–8]