Olivier Rochus (French pronunciation: [ɔlivje ʁɔkys]; born 18 January 1981) is a former Belgian tennis player.

Rochus was a partner of Roger Federer on the junior circuit, winning the boys' doubles title at Wimbledon in 1998.

Rochus reached at least the quarterfinals of all four junior Grand Slam tournaments (including the semifinals of the French Open and Wimbledon).

He reached the final of the Stockholm Open, after winning to Swede Andreas Vinciguerra in the first round, eighth seed Feliciano López, and Jarkko Nieminen.

One week later at the Grand Prix de Lyon, he won his first match against French qualifier Vincent Millot.

The last tournament of his tennis season was the AXA Belgian Masters (Challenger), where he met compatriot Steve Darcis in the semifinal.

In the Nice tournament, one week prior to Roland Garros, he pulled off another upset, defeating 2009 French Open finalist Robin Söderling.

He defeated Raven Klaasen of South Africa at the Hall of Fame Tennis Championship, but lost to Mardy Fish in the final in three sets.