| Ousseini Mounpain | |
| Fullname: | Ousseini Nji Mfifen Mounpain |
| Birth Date: | 20 January 1994 |
| Birth Place: | Yaoundé, Cameroon |
| Height: | 1.86 m |
| Currentclub: | Skopje |
| Youthclubs1: | Asociación Atlética Jorge Griffa |
| Years1: | 2013 |
| Caps1: | 2 |
| Goals1: | 0 |
| Years2: | 2015–2016 |
| Caps2: | 22 |
| Goals2: | 1 |
| Years3: | 2016 |
| Clubs3: | Atenas |
| Caps3: | 4 |
| Goals3: | 0 |
| Years4: | 2017 |
| Clubs4: | Huracán (Paso de la Arena) |
| Caps4: | 4 |
| Goals4: | 0 |
| Years5: | 2018 |
| Clubs5: | Skopje |
| Caps5: | 18 |
| Goals5: | 1 |
| Years6: | 2018–2019 |
| Clubs6: | Austria Klagenfurt |
| Caps6: | 18 |
| Goals6: | 0 |
| Years7: | 2020 |
| Clubs7: | Tarbes |
| Years8: | 2020 |
| Clubs8: | Kozani |
| Years9: | 2022– |
| Clubs9: | Skopje |
| Nationalyears1: | 2018 |
| Nationalteam1: | Cameroon |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
Ousseini Nji Mfifen Mounpain (born 20 January 1994) is a Cameroonian professional footballer who plays as a defender or midfielder for Skopje.
As a youth player, Mounpain joined the youth academy of Argentine fifth-tier side Asociación Atlética Jorge Griffa.[1] After that, he joined the youth academy of Racing (Avellaneda) in the Argentine top flight.[1] In 2013, he signed for Argentine fourth tier club .[2] In 2015, Mounpain signed for Muñiz in the Argentine fifth tier.[3] In 2016, he signed for Uruguayan second tier club Atenas.[4] Before the second half of 2017–18, he signed for Skopje in North Macedonia.
In 2018, Mounpain signed for Austrian second tier team Austria Klagenfurt, where he made 18 league appearances. On 17 August 2018, he debuted for [Austria Klagenfurt during a 1–0 loss to [[FC Wacker Innsbruck (2002)|Wacker II]]. In 2020, Mounpain signed for Tarbes in the French sixth tier.[5] After that, he signed for Greek outfit Kozani.[6] Before the second half of 2021–22, he returned to Skopje in North Macedonia.[7]