The marbled skink (Oligosoma oliveri), also known commonly as Oliver's New Zealand skink and Oliver's skink, is a species of lizard in the subfamily Lygosominae of the family Scincidae. The species is endemic to New Zealand.
The specific name, oliveri, is in honor of New Zealand ornithologist Walter Reginald Brook Oliver.
Oligosoma oliveri may attain a maximum snout-to-vent length (SVL) of .
The preferred natural habitat of Oligosoma oliveri is the leaf litter of forest and shrubland.
Oligosoma oliveri is terrestrial, and it is both crepuscular and nocturnal.
Oligosoma oliveri is omnivorous. It preys upon invertebrates, and it also eats berries and other fruit.
Oligosoma oliveri is viviparous. Litter size is two to four neonates.