| Mauritania U-20 | |
| Fifa Trigramme: | MTN |
| Association: | Football Federation of the Islamic Republic of Mauritania |
| Confederation: | CAF (Africa) |
| Home Stadium: | Stade Olympique |
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| Regional Name: | Africa U-20 Cup of Nations |
| Regional Cup Apps: | 3 |
| Regional Cup First: | 1981 |
| Regional Cup Best: | 1st round (1981, 1987, 2021) |
Mauritania national under-20 football team (Arabic: منتخب موريتانيا الوطني لكرة القدم تحت 20 سنة), represents Mauritania in association football at an under-20 age level and is controlled by the Football Federation of the Islamic Republic of Mauritania, the governing body for football in Mauritania.
Runners-up (1): 2012
| FIFA U-20 World Cup | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Appearances: 0 | |||||||||
| Year | Round | Position | GP | W | D | L | GS | GA | |
 1977 | Did not enter | ||||||||
 1979 | |||||||||
 1981 | Did not qualify | ||||||||
 1983 | Did not enter | ||||||||
| 1985 | |||||||||
 1987 | Did not qualify | ||||||||
 1989 | Withdrew before qualification | ||||||||
 1991 | Did not qualify | ||||||||
| 1993 | |||||||||
 1995 | Withdrew before qualification | ||||||||
 1997 | Did not qualify | ||||||||
 1999 | Withdrew before qualification | ||||||||
 2001 | Did not qualify | ||||||||
| 2003 | Withdrew before qualification | ||||||||
 2005 | Did not enter | ||||||||
 2007 | Did not qualify | ||||||||
 2009 | |||||||||
 2011 | Did not enter | ||||||||
 2013 | Did not qualify | ||||||||
 2015 | |||||||||
| 2017 | |||||||||
 2019 | |||||||||
| 2023 | |||||||||
| 2025 | |||||||||
| Total | – | 0/24 | – | – | – | – | – | – | |
| Africa U-20 Cup of Nations | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Appearances: 2 | |||||||||
| Year | Round | Position | GP | W | D | L | GS | GA | |
| 1979 | Did not enter | ||||||||
| 1981 | Round 1 | 13th | 2 | 0 | 0 | 2 | 1 | 6 | |
| 1983 | Did not enter | ||||||||
| 1985 | |||||||||
| 1987 | Round 1 | 12th | 2 | 0 | 0 | 2 | 0 | 6 | |
| 1989 | Withdrew before qualification | ||||||||
| 1991 | Did not qualify | ||||||||
| 1993 | |||||||||
| 1995 | Withdrew before qualification | ||||||||
 1997 | Did not qualify | ||||||||
 1999 | Withdrew before qualification | ||||||||
 2001 | Did not enter | ||||||||
 2003 | Withdrew before qualification | ||||||||
 2005 | Did not enter | ||||||||
| 2007 | Did not qualify | ||||||||
 2009 | |||||||||
| 2011 | Did not enter | ||||||||
| 2013 | Did not qualify | ||||||||
 2015 | |||||||||
| 2017 | |||||||||
| 2019 | |||||||||
| 2021 | Group stage | 9th | 3 | 1 | 1 | 1 | 3 | 3 | |
| 2023 | Did not qualify | ||||||||
| 2025 | Withdrew before qualification | ||||||||
| Total | Round 1 | 3/24 | 7 | 1 | 1 | 5 | 4 | 15 | |
| WAFU U-20 Championship | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Appearances: 2 | |||||||||
| Year | Round | Position | GP | W | D | L | GS | GA | |
| 2008 | Group stage | 14th | 3 | 0 | 0 | 3 | 1 | 10 | |
 2018 | Did not enter | ||||||||
| 2019 | Group stage | 7th | 3 | 0 | 1 | 2 | 2 | 6 | |
| 2020 | Did not enter | ||||||||
| Total | Group stage | 2/4 | 6 | 0 | 1 | 5 | 3 | 16 | |
| Arab Cup U-20 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Appearances: 4 | |||||||||
| Year | Round | Position | |||||||
| 2011 | Did not enter | ||||||||
 2012 | Group stage | 8th | 3 | 1 | 0 | 2 | 4 | 5 | |
| 2014 | Cancelled | ||||||||
| 2020 | Group stage | 11th | 3 | 1 | 0 | 2 | 2 | 3 | |
| 2021 | Group stage | 13th | 3 | 0 | 1 | 2 | 1 | 5 | |
| 2022 | Group stage | 12th | 2 | 1 | 0 | 1 | 1 | 2 | |
| Total | Group stage | 4/5 | 11 | 3 | 1 | 7 | 8 | 15 | |
The following players were called up for the 2021 UNAF U-20 Tournament.[1]