Boolaroo Subgroup is a geologic formation in the Lachlan Orogen in eastern Australia in the Hunter Region.

Formed in the late Permian, it is part of the Newcastle Coal Measures.

This formation includes sandstone, conglomerate, tuff, and black coal.

Belmont Conglomerate Member, part of the Boolaroo Subgroup can be seen at Caves Beach, New South Wales.

This article about a specific Australian geological feature is a stub.