洋葱螺（学名：Rapa rapa），是新腹足目珊瑚螺科Rapa的一种。主要分布于印度尼西亚、台湾，常栖息在浅海。

Rapa rapa, common name the bubble turnip, is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.