Dirk Leppen (born 23 August 1966) is a German former professional tennis player.

Leppen, a native of Vreden, reached a career high singles ranking of 174 in the world and 12th nationally.

[1] He featured in the qualifying draw for the 1990 Wimbledon Championships.

[2] His ATP Tour main draw appearances include 1990 Italian Open (Rome Masters), where he was beaten in the first round by sixth seed Martín Jaite.

[3]