Onchidella carpenteri, commonly known as the leather limpet, is a species of pulmonate sea slug, a marine gastropod mollusc in the order Systellommatophora and the family Onchidiidae. Members of the family Onchidiidae breathe air using a lung rather than gills, as they are more closely related to terrestrial slugs rather than the other marine gastropods also informally referred to as sea slugs (such as nudibranchs).

This species may also be referred to as Onchidella borealis (Dall, 1872), but this binomial is unaccepted by WoRMS.

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