The Grey-backed Storm-petrel (Garrodia nereis) is a species of seabird in the Hydrobatidae family. It is monotypic within the genus Garrodia which was named by William Alexander Forbes in 1881 after Alfred Henry Garrod, while the specific descriptor is an allusion to the Nereids, the sea nymphs of Greek mythology.

It is found in Antarctica, Argentina, Australia, Chile, Falkland Islands, French Southern Territories, New Zealand, Saint Helena, South Africa, and South Georgia and the South Sandwich Islands. Its natural habitat is open seas.