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

The upper surface is blotched irregularly with pink and brown, and some spiral articulated lines.

The body whorl is convex above, and slightly depressed beneath the suture, at the periphery flattened and biangulate.

The base of the shell is nearly flat, delicately spirally striate, around the umbilicus encircled with a shallow groove.

The umbilicus is white, deep, surrounded by a whitish callus forming a faint tooth at the base of the columella.