The Count's Feud, also called the Count's War, is a civil war that rages in Denmark in 1534–1536 and brings about the Reformation in Denmark.The Count's Feud takes its name from the Protestant Count Christopher of Oldenburg, who supports the Catholic King Christian II, deposed in 1523 and at this time being held in prison.After Frederick I's death in 1533, the Jutland nobility proclaimshis son, then Duke Christian of Gottorp, as King under the name Christian III.

Meanwhile, Count Christopher organizes an uprising against the new king, demanding that Christian II be set free.

Supported by Lübeck and troops from Oldenburg and Mecklenburg, parts of the Zealand and Scania nobilities rise up, together with cities such as Copenhagen and Malmö.

The violence itself begins in 1534, when a privateer captain who had earlier been in Christian II's service, Klemen Andersen, called Skipper Clement, at Count Christopher's request instigates the peasants of Vendsyssel and North Jutland to rise up against the nobles.

The headquarters for the revolt came to be in Aalborg.

A large number of plantations are burned down in northern and western Jutland.On 10 August 1534, Count Christopher accepts Scania for Christian II's rule.

The month before, Christopher had been heralded as regent on Christian II's behalf by the Zealand Council in Ringsted.