It is located in the Slovenian Littoral region, extending from the Italian border to the Soča River.

The municipality comprises the Slovenian part of the Gorizia Hills (Slovene: Goriška brda, Italian: Collio Goriziano), which are one of the most important wine-producing microregions in Slovenia.

It enjoys a mild Mediterranean climate and it is protected from the strong Bora wind, which frequently blows in other parts of the Slovenian Littoral.

Brda is the native land of the poet Alojz Gradnik, who was born in the village of Medana.

The Slovenian sitcom Ena žlahtna štorija is set in Brda.