The Dano-Swedish War from 1501 to 1512 is a military conflict between Denmark and Sweden within the Kalmar Union.

The War begins with a Swedish revolt against John, King of Denmark and the siege of Danish-held Stockholm.

Fighting intensifies in 1509 and 1510 when the German city of Lübeck and the Hanseatic League help Sweden to conquer Danish-held Kalmar and Borgholm.

The newly established Danish Navy fights joint Hanseatic-Swedish naval forces at Nakskov and Bornholm in 1510 and 1511.

In April 1512, a peace agreement is signed in Malmö.