| Municipality of Kozje | |
| Native Name: | Občina Kozje |
| Native Name Lang: | sl |
| Settlement Type: | Municipality |
| Coordinates: | 46.1°N 46°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Slovenia |
| Leader Title: | Mayor |
| Leader Name: | Milenca Krajnc |
| Unit Pref: | Metric |
| Area Footnotes: | [1] |
| Area Total Km2: | 89.7 |
| Population Footnotes: | [2] |
| Population Total: | 3010 |
| Population As Of: | 2021 |
| Population Density Km2: | auto |
| Timezone1: | CET |
| Utc Offset1: | +01 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +02 |
The Municipality of Kozje (in Slovenian pronounced as /ˈkoːzjɛ/; Slovenian: Občina 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.[3]
In addition to the municipal seat of Kozje, the municipality also includes the settlements of Bistrica, Buče, Dobležiče, Drensko Rebro, Gorjane, Gradišče, Gubno, Ješovec pri Kozjem, Klake, Lesično, Ortnice, Osredek pri Podsredi, Pilštanj, Podsreda, Poklek pri Podsredi, Topolovo, Vetrnik, Vojsko, Vrenska Gorca, Zagorje, Zdole, and Zeče pri Bučah.