Johannes Trefz (born 7 June 1992 in Starnberg) is a German sprinter specialising in the 400 metres.

[1] He won a bronze medal in the 4 × 400 metres relay at the 2011 European Junior Championships.

He plays for LG Stadtwerke München [de].

In 2019, he won the bronze medal in the team event at the 2019 European Games held in Minsk, Belarus.

This biographical article about a German sprinter is a stub.