Kozjak
Introduction '''Kozjak''' is a common South Slavic toponym derived from ''koza'' ("goat") that may refer to:
Austria * Kosiak, a mountain in the Karawanks in southern Austria
Bosnia and Herzegovina * , a village near Lopare, Bosnia and Herzegovina
Bulgaria * Kozjak or Kozyak, a medieval name of Obzor* Kozyak, Bulgaria, a village in Silistra Province
Croatia * Kozjak Island, an uninhabited islet near Lošinj, Croatia* Mali Kozjak, a mountain on the Croatian Adriatic coast* Veliki Kozjak, a mountain in the Croatian Dalmatian Zagora* Kozjak, Bilje, a settlement in Croatian Baranja* Kozjak Lake, the largest of the Plitvice Lakes* Kozjak, Zagreb, a neighbourhood in Maksimir, Zagreb
North Macedonia * , a mountain in North Macedonia* Kozjak Hydro Power Plant, with an eponymous artificial lake in North Macedonia* Kozjak, Resen, a village in Resen Municipality, North Macedonia* Kozjak, Karbinci, a village in the Municipality of Karbinci, North Macedonia* Kozjak (mountain near Pčinja), a mountain in North Macedonia and Serbia*  (''Kozjačija''), a region in North Macedonia and Serbia
Serbia * Kozjak (mountain near Pčinja), a mountain in Serbia and North Macedonia*  (''Kozjačija''), a region in Serbia and North Macedonia* Kozjak (Loznica), a village near Loznica, Serbia* Novi Kozjak, a village near Alibunar, Serbia
Slovenia * Kozjak Castle, a castle ruin near Trebnje, Slovenia* Kozjak Mountains, north of the Drava Valley in northeastern Slovenia and southeastern Austria* Kozjak subdialect* Kozjak Pass, a mountain pass in the Kamnik–Savinja Alps in northern Slovenia=== Settlements ===* Kozjak, Mislinja, a village near Mislinja, Slovenia* Kozjak nad Pesnico, a village in the Municipality of Kungota, northeastern Slovenia* Kozjak pri Ceršaku, a village in the Municipality of Šentilj, northeastern Slovenia* Paški Kozjak, a village in the Municipality of Velenje, northeastern Slovenia* Kozjak, a hamlet of Zabukovje in the Municipality of Šentrupert, southeastern Slovenia