Joeri Jansen (born 28 May 1979 in Turnhout) is a former Belgian athlete that specialised in the 800 m. Jansen made his international breakthrough, when he was awarded the silver medal at the 2001 European Athletics U23 Championships.

Four years later, he came in as 5th at the European Indoor Championship.

He competed at the 2004 Summer Olympics but was eliminated in the heats.