| Youssouf Oumarou | |
| Fullname: | Youssouf Oumarou Alio[1] |
| Birth Date: | 16 February 1993 |
| Birth Place: | Niamey, Niger |
| Height: | 1.90 m |
| Position: | Midfielder |
| Currentclub: | Stade Tunisien |
| Clubnumber: | 12 |
| Years1: | 2012–2013 |
| Clubs1: | Sahel SC |
| Years2: | 2013–2015 |
| Clubs2: | AS FAN |
| Years3: | 2015 |
| Clubs3: | US Bitam |
| Years4: | 2016–2017 |
| Clubs4: | AS FAN |
| Years5: | 2017–2018 |
| Clubs5: | MC Oujda |
| Years6: | 2018–2019 |
| Clubs6: | KAC Kénitra |
| Years7: | 2019–2020 |
| Clubs7: | US Gendarmerie |
| Years8: | 2020–2021 |
| Clubs8: | FC San-Pédro |
| Years9: | 2021–2023 |
| Caps9: | 43 |
| Goals9: | 12 |
| Years10: | 2023–2024 |
| Clubs10: | Espérance de Tunis |
| Caps10: | 5 |
| Goals10: | 2 |
| Years11: | 2024– |
| Clubs11: | Stade Tunisien |
| Caps11: | 0 |
| Goals11: | 0 |
| Nationalyears1: | 2013– |
| Nationalteam1: | Niger |
| Nationalcaps1: | 63 |
| Nationalgoals1: | 5 |
| Club-Update: | 3 January 2024 |
| Nationalteam-Update: | 14 November 2024 |
Youssouf Oumarou Alio (born 16 February 1993) is a Nigerien professional footballer who plays for Tunisian Ligue Professionnelle 1 club Stade Tunisien and the Niger national team.
Oumarou debuted internationally for the Niger national team on 13 November 2015 in a friendly match against Nigeria in a 2–0 loss.
On 16 October 2018, he scored his first goal for Niger against Tunisia in a 2–1 defeat during the 2019 Africa Cup of Nations qualification to be held in Cameroon.
On 8 October 2021, during the 2022 FIFA World Cup qualifying match against Algeria, he scored an own goal which resulted in a 6–1 defeat.[2]