Tegula melaleucos is a species of sea snail, a marine gastropod mollusk in the family Tegulidae.

Characteristics of this species are: the whorls are divided by a nodose keel into a larger convex upper portion and a smaller channelled lower part.

The aperture is subquadrate, nacreous, smooth within, and has a groove indicating the place of the external keel.

The columella is S-shaped, and ends in a blunt tooth, before which there is a small acute denticle.

The pretty markings of the shell consist of oblique, regular wide black streaks, separated by spaces as broad as themselves, on a white ground.