The Municipality of Zagorje ob Savi (pronounced [zaˈɡoːɾjɛ ɔp ˈsaːvi]; Slovene: Občina Zagorje ob Savi) is a municipality in central Slovenia. The seat of the municipality is the town of Zagorje ob Savi. Traditionally the area was part of the Upper Carniola region. The entire municipality is now included in the Central Sava Statistical Region. The population of the municipality is about 17,000.
Archaeological evidence shows that the area was already settled in the Late Bronze Age and Iron Age.