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

The thick, umbilicate shell has an orbiculate-conical shape.

It has a uniform brownish or purplish color.

The five whorls are subcarinate with sutures excavated.

This marine species occurs from Southern Brazil to Southern Chile at depths between 0 m and 57 m.