Alvania chilensis is an extinct species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.
The length of the shell attains 1þ mm.
The minute shell has a globose-conical shape and is imperforate. The shell contains 5ý whorls. The sculpture consists of many longitudinal ribs. The aperture is ovate-orbicular. The inner lip is incrassate.
Fossils of this species were found in Tertiary strata in Chile.