Oligosoma is a genus of small to medium-sized skinks (family Scincidae) found only in New Zealand, Norfolk Island and Lord Howe Island.

Oligosoma had previously been found to belong to the Eugongylus group of genera in the subfamily Lygosominae; the Australian genus Bassiana appears to be fairly closely related.

[1] The currently described species[2] are: A binomial authority in parentheses indicates that the species was originally described in a genus other than Oligosoma.

Numerous undescribed species also exist within the genus, including the cobble skink and tātahi skink.

A molecular phylogenetic analysis[3] has merged the genus Cyclodina with Oligosoma, rendering Cyclodina an obsolete taxon.