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.
The following players received wildcards into the singles main draw:
The 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:
The following players received entry from the qualifying draw:
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following player received entry as a Lucky Loser: