The 2023 Calgary National Bank Challenger was a professional tennis tournament played on indoor hard courts.

It was the fourth edition of the tournament which was part of the 2023 ATP Challenger Tour and the second edition of the tournament which was part of the 2023 ITF Women's World Tennis Tour.

It took place in Calgary, Canada between 6 and 12 November 2023.

The following players received wildcards into the singles main draw: 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: