Oncocephala angusticollis is a species of beetle of the family Chrysomelidae. It is found in Ivory Coast, Cameroon, Guinea and Nigeria.
Adults reach a length of about 5.2 mm. The head, pronotum and elytra are black, while the antennae are dark brownish with a black tinge. The legs are light brownish.
No host plant has been documented for this species.