The Barrier skink, Oligosoma judgei, is a species of medium-sized skink endemic to New Zealand where it lives in the alpine habitat of the Darran and Takitimu mountains of Fiordland. It is one of only 2 species of New Zealand skink that live exclusively in the alpine zone, the other being the "Sinbad skink", Oligosoma pikitanga, a closely related species of similar appearance which is found in the same part of the South Island. The Barrier skink was first collected in the 1960s but was overlooked until rediscovery by a pair of mountain climbers in 2005; the species was scientifically described in 2009.