Rio Hillen (born 5 March 2003) is a Dutch professional footballer who plays as a centre-back for Eerste Divisie club De Graafschap.
In the subsequent season, alongside appearances for U18 and U19, he made his debut for Jong Ajax in the Eerste Divisie as a substitute in stoppage time for Terrence Douglas during a 5–1 victory over MVV.
[8] He made his debut for the club on 7 August, the first matchday of the season, starting in a 2–1 loss to PEC Zwolle.
[9][10] On 30 January 2023, he scored his first professional goal, equalising in the 58th minute of a 1–1 draw against Jong Utrecht.
[7] In October 2023, Hillen faced a setback with a knee injury during an away game against Jong AZ.