The Mines and Geosciences Bureau (MGB) is a government agency of the Philippines under the Department of Environment and Natural Resources (DENR).

The MGB is responsible for the conservation, management, development, and use of the country's mineral resources, including those in reservations and public lands.

It was transfigured during Gen. Emilio Aguinaldo's ruling and created four divisions of Departamento de Fomento under the Philippine Revolutionary Republic.

With the Second World War outbreak, the Bureau of Mines was reconstituted under the Department of Agriculture and Commerce under Executive Order No.

In 1944, during the Puppet Philippine Republic, the Bureau of Mines shrunk again into a Division of the Department of Agriculture and Natural Resources.

This gave it an additional function and the authority to make it more responsive to the objectives of the government's minerals sector.

It conducts engineering geological and geohazard assessments for housing, subdivision, infrastructure, and other land development projects.