Ludo Dierckxsens (born 14 October 1964) is a Belgian former racing cyclist.

He is best known for winning the 11th stage of the 1999 Tour de France, while competing for Lampre–Daikin.

Ludo Dierckxsens won the 11th stage of the 1999 Tour de France.

When the doctors asked him the routine question if he had taken any products which might cause a positive test result, Dierckxens replied that he had taken tetracosactide (Synacthen) in the Tour of Germany.

This biographical article related to a Belgian cyclist born in the 1960s is a stub.