Kalundborg Eco-Industrial Park is an industrial symbiosis network located in Kalundborg, Denmark, in which companies in the region collaborate to use each other's by-products and otherwise share resources.

Kalundborg is a Danish city with a population of 16,486, the main town of the municipality of the same name and the site of its municipal council. It is situated on the northwestern coast of the largest Danish island, Zealand, on the opposite, eastern side of which lies the capital Copenhagen, 110 km (68 mi) away.