Willy Trepp (born 23 December 1938) is a retired Swiss track cyclist.

He won two silver and one bronze medals in the individual pursuit at the world championships of 1959–1961, behind Rudi Altig.

[1] He also rode in the 1960 Tour de France.

[2] Trepp was the cousin of Ice Hockey player Hans-Martin Trepp.

This biographical article relating to Swiss cycling is a stub.