Oidaematophorus baroni is a moth of the family Pterophoridae that is found in North America (including California and New York). The wingspan is about 30 millimetres (1.2 in). The front of the head is brownish cinereous. The antennae are pale cinereous, dotted above with dark brown. The thorax and abdomen are pale brownish cinereous, the latter marked dorsally by a row of fine black dots on each segment beyond the third. The forewings are brownish cinereous, ochreous on the inner margin and second lobe, the whole surface sprinkled with fine black scales. The fringes are concolorous with the wings. The hindwings and fringes are dark cinereous.