The Napoli of Italy hitman got the highest number of votes ahead of Liverpool’s Mohamed Salah, Manchester City winger, Riyad Mahrez and Yassine Bounou of Morocco.
Osimhen claimed the award for the first time and was also the first Nigerian to achieve the feat.
The 24-year-old previously won two individual awards this season.
The Nigeria international scooped the top scorer award in Serie A and was also named the best striker in the top-flight.
Osimhen is also favourite to win the African Player of the Year award.