Oliver Naesen (Dutch: [ˈɔlivər ˈnaːsə(n)]; born 16 September 1990) is a Belgian professional racing cyclist, who currently rides for UCI WorldTeam Decathlon–AG2R La Mondiale.

[7] Naesen turned professional in August 2014 as a stagiaire with the Lotto–Belisol team, before joining Topsport Vlaanderen–Baloise in 2015 and Swiss UCI WorldTeam IAM Cycling in 2016.

[10] He made a spectacular crash in the last corner of the stage 18 mountain time trial, but finished his maiden Tour in 83rd position overall.

[12] In September, he finished second in the general classification of the 2016 Eneco Tour after a strong performance in the final stage to Geraardsbergen.

[16] In Summer, he won the 2017 Belgian National Road Race Championships in Antwerp,[5] before competing in his second Tour de France.