The Battle of Brunnbäck Ferry (Swedish: Slaget vid Brunnbäcks färja) was the first major battle in the Swedish War of Liberation, between rebels rallied by Gustav Vasa that had marched down from occupied Falun and Danish troops from Västerås.

Shortly afterwards rebel troops under Peder Svensson arrived on the opposite side of the river.

The rebels engaged the Danish soldiers by archery, causing many casualties and forcing the enemy to retreat.

When the Danes left their camp he attacked, while the remaining rebels moved over the river.

Those who were not cut down fled either by throwing themselves into the river or on the main road, the latter being chased far into Västmanland.