Elachista radiantella is a moth of the Elachistidae family. It is found in the United States, where it has been recorded from the District of Columbia, Virginia, Ohio, Kentucky and Maine. The wingspan is 5.5-6.4 mm. The forewing are dark brown with a faint golden luster. The markings are silvery with a golden and opalescent luster. The hindwings are brownish gray. Adults have been recorded on wing from June to July.