The Brazil forward, who fractured a vertebra in his country's World Cup quarter-final win against Chile, will miss the start of La Liga season as he recovers.
After travelling to Japan earlier this week to film a mattress advert, the 22-year-old jetted off to the party capital of the world where he met the American socialite.
He and Hilton, who is the daughter of Hilton Hotels founder Conrad Hilton, appear to enjoying a night out together in the picture posted to his 10 million Instagram followers.
parishilton: So much fun out in Ibiza last night with @NeymarJr & friends! #Brazil ️ #GoodTimes 3h
Neymar also shared an image of himself with Bayern Munich's Bastian Schweinsteiger, who is enjoying an extended break after helping Germany lift the World Cup in Brazil.
The former Santos star wished the midfielder a happy birthday as he turned 30.
flop article, this is mostly for the pics
bonus: Paris + Bastian