The Municipality of Kostel (pronounced [ˈkɔːstɛu̯]; Slovene: Občina Kostel) is a municipality in southern Slovenia.

Its seat is the settlement of Vas.

[2] It is part of the traditional region of Lower Carniola and is now included in the Southeast Slovenia Statistical Region.

In addition to the municipal seat of Vas, the municipality also includes the following settlements:

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