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Petroleum is the primary source of energy in the United States, with a consumption of 35.9 quadrillion British thermal units in 2025. Closely following, the U.S. had 34.63 quadrillion British thermal units of energy derived from natural gas. 

Energy consumption by sector in the United States

Petroleum is predominantly utilized as a fuel in the transportation sector, which is also the second-largest consumer of energy in the U.S. with almost 30 percent of the country’s total energy consumption in 2025. This figure is topped only by the energy-guzzling industrial sector, a major consumer of fossil fuels such as petroleum and natural gas. 

Renewable energy in the United States

Despite the prevalence of fossil fuels in the U.S. energy mix, the use of renewable energy consumption has grown immensely in the last decades to approximately 6.72 exajoules in 2025. Most of the renewable energy produced in the U.S. is derived from biomass, hydro, and wind sources. In 2025, renewable electricity accounted for approximately 24 percent of the nation’s total electricity generation.