NEW YORK (AP) — Nearly a third of U.S. households have trouble paying their energy bills, and the problem mainly impacts racial minorities, according to a report released Wednesday by the Energy Information Administration.

One in five households — an estimated 25 million — went without food, medicine or other necessities to pay their gas or electric bills in 2015, the latest year in which the numbers were available.

At the same time, overall energy-related spending was at its lowest point in more than a decade due to lower fuel and natural gas prices, said the energy administration, a division...