Pacificella baldwini is a species of tropical air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae.
The length of the shell attains 2.5 mm, its diameter 1.5 mm.
(Original description in Latin) The shell is oblong-ovate in shape, imperforate, thin, translucent, horn-colored, and glossy, appearing under a lens as only very faintly striated. The spire is conoid and rises slightly above the aperture, with a somewhat sharp apex. There are four convex whorls, rapidly increasing in size, the body whorl being oblong. The aperture is sharply oblong-ovate, not compressed externally, and bears on the parietal wall a rather small, coiling lamella. The columella is thickened, whitish, toothless, and obliquely twisted, continuing anteriorly into the margin.
This species occurs on Oahu Island, Hawaii.