Oncocephala dimaculanganae is a species of beetle of the family Chrysomelidae. It is found in Cameroon.
Adults reach a length of about 5 mm. The head, pronotum and elytra are black with a dark brown tinge, while the legs are dark brown with a blackish tinge.
No host plant has been documented for this species.
The species is named after the Regional Executive Director (RED) Vilma M. Dimaculangan of the Department of Agriculture, Regional Field Unit-IV-CALABARZON, Maraouy, Lipa City, Batangas, Philippines.