东沙谷米螺（学名：Marginellona gigas），是新腹足目谷米螺科谷米螺属的一种。主要分布于台湾，常栖息在深海。

Marginellona gigas is a species of very large deepwater sea snail, a marine gastropod mollusk in the family Marginellidae. This species was originally thought to be a volute, in the family Volutidae, but it is in fact a giant marginellid.

This is the only known species in the genus Marginellona, in other words, Marginellona is a monotypic genus.