Kalle Kristian Coster (born 9 December 1982 in Leiden) is a sailor from the Netherlands.

[1][2] Coster represented his country for the first time at the 2004 Summer Olympics in Athens.

With his brother Sven Coster as helmsman, Coster took 6th place as crew in the Dutch Men's 470.

[6][7] Again with Sven as helmsman in the Men's 470 Coster crewed the Dutch 470 at the 2012 Olympics in Weymouth.

This biographical article related to sailing in the Netherlands is a stub.