| Date: | July 15 – July 21 |
| Edition: | 20th (men) 3rd (women) |
| Category: | ATP Challenger Tour ITF Women's Circuit |
| Prize Money: | (men) (women) |
| Surface: | Hard – outdoors |
| Location: | Granby, Quebec, Canada |
| Venue: | Club de tennis des Loisirs de Granby |
| Champms: |  Frank Dancevic |
| Champws: |  Risa Ozaki |
| Champmd: | Érik Chvojka / Peter Polansky |
| Champwd: |  Lena Litvak / Carol Zhao |
| Main Name: | Challenger de Granby |
The 2013 Challenger Banque Nationale de Granby was a professional tennis tournament played on outdoor hard courts. It was the 20th edition, for men, and 3rd edition, for women, of the tournament and part of the 2013 ATP Challenger Tour and the 2013 ITF Women's Circuit, offering totals of $50,000, for men, and $25,000, for women, in prize money. It took place in Granby, Quebec, Canada between July 15 and July 21, 2013.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Slovakia | Lukáš Lacko | 100 | 1 | |
 France | Nicolas Mahut | 127 | 2 | |
| Japan | Tatsuma Ito | 174 | 3 | |
 Belgium | Maxime Authom | 180 | 4 | |
 Australia | Matt Reid | 187 | 5 | |
| Canada | Frank Dancevic | 195 | 6 | |
| Japan | Hiroki Moriya | 199 | 7 | |
| Canada | Steven Diez | 211 | 8 |
The following players received wildcards into the singles main draw:
Philip Bester Hugo Di Feo Filip Peliwo Brayden SchnurThe following players received entry from the qualifying draw:
Tyler Hochwalt Pavel Krainik Blake Mott Milan PokrajacSee main article: 2013 Challenger Banque Nationale de Granby – Men's singles.
Frank Dancevic def. Lukáš Lacko, 6–4, 6–7(4–7), 6–3See main article: 2013 Challenger Banque Nationale de Granby – Women's singles.
Risa Ozaki def. 
Samantha Murray, 0–6, 7–5, 6–2See main article: 2013 Challenger Banque Nationale de Granby – Men's doubles.
Érik Chvojka / Peter Polansky def. Adam El Mihdawy / Ante Pavić, 6–4, 6–3See main article: 2013 Challenger Banque Nationale de Granby – Women's doubles.
Lena Litvak / Carol Zhao def. Julie Coin / Emily Webley-Smith, 7–5, 6–4