Oncerinae is a small subfamily of scarab beetles in the family Scarabaeidae. There are only two genera Oncerinae, each with a single species.

Oncerinae has been sometimes classified as a tribe of the subfamily Melolonthinae, "Oncerini".

Genera These two genera belong to the subfamily Oncerinae: Genus Nefoncerus Saylor, 1938 - Neotropics Nefoncerus convergens (Horn, 1894) Genus Oncerus LeConte, 1856 - North America Oncerus floralis LeConte, 1856

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