Bjørn Håvard Wiik (born 17 February 1937 in Bruvik, Norway; died 26 February 1999 in Hamburg, Germany) was a Norwegian elementary particle physicist, noted for his role on the experiment that produced the first experimental evidence for gluons and for his influential role on later accelerator projects.
Wiik was director of DESY, in Hamburg, Germany, from 1993 until his death.