| 2020 Calgary National Bank Challenger | |
|---|---|
| Date | 24 February–1 March |
| Edition | 2nd |
| Surface | Hard (indoor) |
| Location | Calgary, Canada |
| Champions | |
| Singles | |
 Arthur Rinderknech | |
| Doubles | |
 Nathan Pasha / Max Schnur | |
The 2020 Calgary National Bank Challenger was a professional tennis tournament played on indoor hard courts. It was the second edition of the tournament and part of the 2020 ATP Challenger Tour. It took place in Calgary, Canada.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 CAN | Vasek Pospisil | 98 | 1 |
 JPN | Go Soeda | 114 | 2 |
 CRO | Ivo Karlović | 123 | 3 |
| JPN | Tatsuma Ito | 152 | 4 |
| CAN | Brayden Schnur | 178 | 5 |
| USA | Thai-Son Kwiatkowski | 182 | 6 |
 GBR | Liam Broady | 228 | 7 |
| FRA | Arthur Rinderknech | 239 | 8 |
 GER | Julian Lenz | 245 | 9 |
| USA | Maxime Cressy | 252 | 10 |
| GER | Tobias Kamke | 254 | 11 |
 AUS | Akira Santillan | 258 | 12 |
| USA | JC Aragone | 267 | 13 |
| FRA | Geoffrey Blancaneaux | 270 | 14 |
 POR | Gonçalo Oliveira | 278 | 15 |
| FRA | Manuel Guinard | 300 | 16 |
The following players received wildcards into the singles main draw:
Taha Baadi Gabriel Diallo Alexis Galarneau Cleeve Harper Joshua PeckThe following player received entry into the singles main draw using a protected ranking:
The following players received entry from the qualifying draw:
Felix Corwin Alex Rybakov The following players received entry as lucky losers:
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