Geothermal energy is the heat from the Earth. It's clean and sustainable. Resources of geothermal energy range from the shallow ground to hot water and hot rock found a few miles beneath the Earth's surface, and down even deeper to the extremely high temperatures of molten rock called magma.

The Department of Energy’s Geothermal Technologies Program supports the U.S. geothermal industry in providing diversity, and therefore security, in domestic energy supply options.   This support also helps the industry maintain its technical edge in world energy markets, thereby enhancing exports of U.S. goods and services and U.S. job growth. Energy works in partnership with U.S. industry to establish geothermal energy as an economically competitive contributor to the U.S. energy supply. 

The Office of Scientific and Technical Information maintains technical reports related to geothermal energy on its Geothermal Energy Technology (GET) subject portal.

Information on geothermal generation and capacity is available through the Energy Information Administration.