Lövstabruk is a village on a common in the parish of Österlövsta, Tierp Municipality, Uppsala County, Sweden. In 2010 it had a population of 96, compared to some 1300 at its height during the 18th century. The word lövsta is derived from lösta, an old Swedish word for "glade". The contemporary spelling in the 18th century was Leufsta, with French orthography reflecting the Walloon origin of the workforce. The latter part of the name, bruk, means both "mill town" and "ironworks".