1640 in Denmark

Events from the year 1640 in Denmark.

Incumbents

 * Monarch – Christian IV

Events

 * Børsen (the stock exchange in Copenhagen) completed

Births

 * 1 April – Georg Mohr, mathematician (died 1697)

Deaths

 * 6 October – Christian Ulrik Gyldenløve, military officer and diplomat (born 1611).