The Hudinja (pronounced [xuˈdiːnja]) is a river in Styria, Slovenia. The river is 32 kilometres (20 mi) in length. Its source is on the Pohorje Massif southwest of Mount Rogla, about 1350 m above sea level, near the source of Dravinja River. The river passes Vitanje, Socka Castle, Vojnik, and Celje, where it merges with the Savinja. A district of Celje also named Hudinja lies on the river.
- "Reke, dolge nad 25 km, in njihova padavinska območja" [Rivers longer than 25 km and their catchment areas] (in Slovenian and English). Statistical Office of the Republic of Slovenia. 2002.
- Media related to Hudinja (river) at Wikimedia Commons