The Chumash are a Native American people of the central and southern coastal regions of California, in portions of what is now San Luis Obispo, Santa Barbara, Ventura and Los Angeles counties, extending from Morro Bay in the north to Malibu in the south. Their territory included three of the Channel Islands: Santa Cruz, Santa Rosa, and San Miguel; the smaller island of Anacapa was likely inhabited seasonally due to the lack of a consistent water source.
Modern place names with Chumash origins include Malibu, Nipomo, Lompoc, Ojai, Pismo Beach, Point Mugu, Port Hueneme, Piru, Lake Castaic, Saticoy, Simi Valley and Somis.
Archaeological research demonstrates that the Chumash people have deep roots in the Santa Barbara Channel area and lived along the southern California coast for millennia.
Indigenous peoples have lived along the California coast for at least 11,000 years. Sites of the Millingstone Horizon date from 7000 to 4500 BC and show evidence of a subsistence system focused on the processing of seeds with metates and manos. During that time, people used bipointed bone objects and line to catch fish and began making beads from shells of the marine olive snail (Olivella biplicata). The name Chumash means "bead maker" or "seashell people" being that they originated near the Santa Barbara coast. The Chumash tribes near the coast benefited most with the "close juxtaposition of a variety of marine and terrestrial habitats, intensive upwelling in coastal waters, and intentional burning of the landscape made the Santa Barbara Channel region one of the most resource abundant places on the planet."
While droughts were not uncommon in the centuries of the first millennium AD, a population explosion occurred with the coming of the medieval warm period. "Marine productivity soared between 950 and 1300 as natural upwelling intensified off the coast." Before the mission period, the Chumash lived in over 150 independent villages, speaking variations of the same language.