Kotlje (pronounced [ˈkɔːtljɛ]) is a village in the hills south of Ravne na Koroškem in the Carinthia region in northern Slovenia.

The parish church in the village is dedicated to Saint Margaret and belongs to the Roman Catholic Archdiocese of Maribor.

It was first mentioned in written documents dating to 1367, but has been rebuilt and expanded a number of times.

[3] Notable people that were born or lived in Kotlje include:

This article about the Municipality of Ravne na Koroškem in Slovenia is a stub.