Olivier Kemen (born 20 July 1996) is a Cameroonian professional footballer who plays as a midfielder for Süper Lig club İstanbul Başakşehir.

He made his Ligue 1 debut for Lyon on 28 February 2016 against Paris Saint-Germain replacing Rafael after 75 minutes in a 2–1 home win.

[3] On 11 January 2017, Kemen joined Ligue 2 side Ajaccio on loan until the end of the season.

[5] He signed for Chamois Niortais in July 2019,[6] and went on to make 62 appearances in Ligue 2 for the club.

On 29 August 2021, after two season with Niort, Kemen joined Süper Lig club Kayserispor for an undisclosed fee, signing a three-year contract.