Ondina warreni is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

[1][2] Compared with Ondina obliqua, the shell of Ondina warreni is smaller, its length varying between 0.8 mm and 3.2 mm.

The basal striae are more distinct, and the umbilicus is more developed.

[3] This species occurs in the following locations:[1]

This Pyramidellidae-related article is a stub.