Nepotilla microscopica is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

The two adult whorls are strongly angled at the periphery, from whence to the suture they are flat or concave.

They are widely separated, the interspaces being crossed by a few very faint spiral lirae.

The sinus at the suture is deep and open and bordered by a varix.

This marine species is endemic to Australia and occurs off Tasmania.