Kobiljek (pronounced [kɔˈbiːljɛk]) is a former village in central Slovenia in the Municipality of Zagorje ob Savi.

Kobiljek lies north of Borje, in a pass between Jablana Peak (Slovene: Jablanški vrh, elevation 902 meters or 2,959 feet) to the east and Pleše Hill (elevation 866 meters or 2,841 feet) to the northwest.

The name Kobiljek is related to toponyms such as Kobilje and Koble, and it is derived from Slavic *kobyla 'mare'.

[2] Kobiljek was annexed by Borje in 1953, ending its existence as a separate settlement.

This article about the Municipality of Zagorje ob Savi in Slovenia is a stub.