Eike Onnen (born 3 August 1982 in Hannover) is a German high jumper.

He comes from a sporting family with sister Imke also being a high jumper while mother Astrid Fredebold-Onnen a former heptathlete.

He became German champion in 2005 and 2006, and represents the club LG Hannover.

He tied for third with Chris Baker in the 2016 European Athletics Championships.

This biographical article about a German high jumper is a stub.