Jan Dieteren (born 12 April 1993) is a German cyclist, who currently rides for German amateur team RSV Kempten.

[1] In early 2016, he was diagnosed with testicular cancer.

Because of this, he did not compete during the 2016 season, but resumed competition in April 2017.

[2] Dieteren failed to finish any races in 2017 either.

This biographical article related to a German cycling person born in the 1990s is a stub.