| Date: | 17–23 July 2023 |
| Edition: | 28th |
| Surface: | Hard |
| Location: | Granby, Quebec, Canada |
| Champms: |  Alexis Galarneau |
| Champmd: |  Christian Harrison / Miķelis Lībietis |
| Champws: | Kayla Day |
| Champwd: |  Marcela Zacarías / Renata Zarazúa |
| Main Name: | Championnats de Granby |
The 2023 Championnats Banque Nationale de Granby was a professional tennis tournament played on outdoor hard courts. It was the 28th edition of the tournament, which was part of the 2023 ATP Challenger Tour and the 2023 ITF Women's World Tennis Tour. It took place in Granby, Quebec, Canada between 17 and 23 July 2023.
See main article: 2023 Championnats Banque Nationale de Granby – Men's singles.
Alexis Galarneau def. 
Philip Sekulic 6–4, 3–6, 6–3.See main article: 2023 Championnats Banque Nationale de Granby – Women's singles.
Kayla Day def. Katherine Sebov, 6–4, 2–6, 7–5.See main article: 2023 Championnats Banque Nationale de Granby – Men's doubles.
Christian Harrison / Miķelis Lībietis def. Tristan Schoolkate / Adam Walton 6–4, 6–3.See main article: 2023 Championnats Banque Nationale de Granby – Women's doubles.
Marcela Zacarías / Renata Zarazúa def. Carmen Corley / Ivana Corley, 6–3, 6–3.| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Australia | Thanasi Kokkinakis | 90 | 1 | |
 France | Arthur Cazaux | 139 | 2 | |
 China | Shang Juncheng | 155 | 3 | |
| Canada | Vasek Pospisil | 157 | 4 | |
| United States | Denis Kudla | 180 | 5 | |
 Japan | Rio Noguchi | 213 | 6 | |
| Canada | Alexis Galarneau | 215 | 7 | |
| France | Giovanni Mpetshi Perricard | 218 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry into the singles main draw using protected rankings:
The following player received entry into the singles main draw as an alternate:
The following players received entry from the qualifying draw:
Blaise Bicknell Nick Chappell Patrick Kypson Philip Sekulic Joshua Sheehy James TrotterThe following players received entry as lucky losers:
Alexander Cozbinov Nathan Ponwith| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Canada | Rebecca Marino | 83 | 1 | |
| United States | Ashlyn Krueger | 109 | 2 | |
| United States | Kayla Day | 120 | 3 | |
| United States | Emina Bektas | 140 | 4 | |
| Canada | Katherine Sebov | 157 | 5 | |
| Japan | Himeno Sakatsume | 170 | 6 | |
| United States | Katrina Scott | 185 | 7 | |
| Mexico | Marcela Zacarías | 190 | 8 |
The following players received wildcards into the singles main draw:
Bianca Fernandez Mia Kupres Layne Sleeth Annabelle XuThe following player received entry into the singles main draw using a protected ranking:
The following players received entry from the qualifying draw:
Ayana Akli Eryn Cayetano Carmen Corley Jaeda Daniel Ava Markham Rhea Verma