Hierodoris gerontion is a moth of the family Oecophoridae. It is endemic to New Zealand and is found in the alpine zones of the mountain ranges in Central Otago. This species prefers habitat near seepages and is also common in fellfields. H. gerontion is variable in appearance with the hindwings varying in appearance from white to a darkened brownish shade. It can be distinguished from other species in the Hierodoris genus as on the second segment of the labial palpi it has sub-erect scales giving the appearance of a shaggy beard. The larvae of this species has yet to be described.

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