Vetrnik (pronounced [ˈʋeːtəɾnik]) is a dispersed settlement in the Municipality of Kozje in eastern Slovenia.

It lies in the southern part of the Sava Hills (Slovene: Posavsko hribovje) west and south of Kozje.

The area is part of the historical Styria region.

The municipality is now included in the Savinja Statistical Region.

This article about the Municipality of Kozje in Slovenia is a stub.