The Municipality of Kozje (; ) is a municipality in the traditional region of Styria in northeastern Slovenia. The seat of the municipality is the town of Kozje. Kozje became a municipality in 1994.
In addition to the municipal seat of Kozje, the municipality also includes the settlements of Bistrica, BuÃÂe, Dobleà ¾iÃÂe, Drensko Rebro, Gorjane, Gradià ¡ÃÂe, Gubno, Jeà ¡ovec pri Kozjem, Klake, LesiÃÂno, Ortnice, Osredek pri Podsredi, Pilà ¡tanj, Podsreda, Poklek pri Podsredi, Topolovo, Vetrnik, Vojsko, Vrenska Gorca, Zagorje, Zdole, and ZeÃÂe pri BuÃÂah.