Kozjak

• Kosiak, a mountain in the Karawanks in southern Austria

• {{ill|Kozjak (Lopare)|fr|v=sup}}, a village near Lopare, Bosnia and Herzegovina

• Kozjak or Kozyak, a medieval name of Obzor
• Kozyak, Bulgaria, a village in Silistra Province

• 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, Maksimir, a neighbourhood in Zagreb

• {{ill|Kozjak (Prilep)|sh|v=sup}}, 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
• {{ill|Kozjačija{{!}}Kozjak (region)|mk|Козјачија|v=sup}} (Kozjačija), a region in North Macedonia and Serbia

• Kozjak (mountain near Pčinja), a mountain in Serbia and North Macedonia
• {{ill|Kozjačija{{!}}Kozjak (region)|mk|Козјачија|v=sup}} (Kozjačija), a region in Serbia and North Macedonia
• Kozjak (Loznica), a village near Loznica, Serbia
• Novi Kozjak, a village near Alibunar, Serbia

• 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

• 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

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