Kelletia kelletii, common name Kellet's whelk, is a species of large sea snail, a whelk, a marine gastropod mollusc in the family Buccinidae, the true whelks. Kelletia kelletii is a large scavenger and predatory sea snail commonly found in subtidal kelp forests, rocky reefs and cobble-sand interfaces at depths ranging from 2 to 70 m from Isla Asunción, Baja California, Mexico to Monterey, California, USA. It aggregates seasonally for mating and it is slow-growing snail. It is also a recently targeted fishery species and a subject of a rapidly expanding fishery.