Niels Christian Kaldau (born 22 December 1974) is a male badminton player from Denmark.

Kaldau won the Portuguese Badminton Champs in 1998, 2002 and 2003, the German Open in 2002, the Bitburger Open in 2004 and the Spanish International Badminton Tournament in 2005.

He won the bronze medal at the 2006 European Badminton Championships in men's singles.

[1] The World Badminton Grand Prix sanctioned by International Badminton Federation (IBF) from 1983 to 2006.

This biographical article relating to Danish badminton is a stub.