The 2023 Winnipeg National Bank Challenger was a professional tennis tournament played on outdoor hard courts.

It was the 6th edition of the tournament and part of the 2023 ATP Challenger Tour.

It took place in Winnipeg, Manitoba, Canada between August 14 and 19, 2023.

The following players received wildcards into the singles main draw: The following player received entry into the singles main draw using a protected ranking: The following players received entry into the singles main draw as alternates: The following players received entry from the qualifying draw: