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

[1][2] The slender, white to transparent shell has a nearly cylindrical shape with an obtuse apex.

The growth lines are somewhat prosocline (i.e. with the growth lines leaning forward (adapically) with respect to the direction of the cone) and not strongly marked.

The columellar tooth is weak and is deeply seated inside the pyriform aperture.

[3] The species was discovered and named by Christoffer Schanderin in honour of Irish conchologist Amy Warren in 1994.