The drop was driven by less demand for coal that is burned for electricity and oil that's refined into gasoline and jet fuel, the U.S. Energy Information Administration said.
The declines were in line with lower energy usage around the globe as the pandemic seized up economies. Those trends are expected to turn around as commercial activity resumes but an annual decline in U.S. and global greenhouse gas emissions is still expected.
Overall U.S. energy consumption dropped 14 percent during April compared to a year earlier, the energy administration said. That's the lowest monthly level since 1989 and the largest decrease ever recorded in data that's been collected since 1973.
Natural gas usage bucked the trend and increased 15 percent during the April lockdown as residential consumption increased with most of the nation under stay-at-home orders.
Petroleum consumption fell to 14.7 million barrels a day in April, down almost a third compared the same period in 2019. Demand already has rebounded some after stay-at-home orders expired and large sectors of the economy started moving again.
Coal companies are expected to have a tougher time than petroleum producers recovering from the pandemic, which hit as the coal sector already remained on a fairly steady downward spiral since 2007 despite President Donald Trump's attempts to prop it up.
Coal consumption fell 27 percent in April compared to the same period in 2019, to 27 million tons. Most coal produced in the U.S. is used to generate electricity but many utilities have switched to to cheaper natural gas and renewable sources like wind and solar.
The energy administration projects overall consumption will increase for the rest of 2020 but remain below 2019 levels.