Lilium maritimum is a species of lily known by the common name coast lily. It is endemic to California, where it is known only from the coastline north of San Francisco. It formerly occurred south of San Francisco; these occurrences have all been extirpated. The species is now restricted to the North Coast from Marin County to Del Norte County, and is most common in Mendocino County. It grows in the California coastal prairie habitat, coniferous forests, and bogs amongst Drosera species.