| Champ: |  Jason Kubler |
| Runner: |  Enzo Couacaud |
| Score: | 6–4, 6–4 |
| Main Name: | Challenger de Gatineau |
| Before Name: | Challenger Banque Nationale de Gatineau – Men's singles |
| After Name: | Challenger Banque Nationale de Gatineau – Men's singles |
See main article: article and 2019 Challenger Banque Nationale de Gatineau.
Bradley Klahn was the defending champion but chose not to defend his title.[1]
Jason Kubler won the title after defeating Enzo Couacaud 6–4, 6–4 in the final.
All seeds receive a bye into the second round.