The Geological Survey of Belgium (GSB, French: Service géologique de Belgique) is a Belgian federal research institute for Belgian geology. It is a department of the Royal Belgian Institute of Natural Sciences. The institute is as a resource centre and project partner which produces maps, books and databases of Belgian geology. The GSB is a member of the European Geological Surveys network.

The institute was founded in 1896 and includes a Documentation Center for Earth Sciences on geological and hydrogeological data and a Research and Development department.

• BELSPO
• Geographical Information System (GIS)
• International Union of Geological Sciences

• Memoirs of the Geological Survey of Belgium
• Geological Survey of Belgium - Marine Geology Group^{[permanent dead link‍]}
• Museum of the Geological Survey of Belgium (GSB)

• Geological Survey of Belgium