The archaeological La Jolla complex (Shell Midden People, Encinitas Tradition, Millingstone Horizon) represents a prehistoric culture oriented toward coastal resources that prevailed during the middle Holocene period between c. 8000 BC and AD 500 in southwestern California and northwestern Baja California.
Bones from sea mammals and fish occur in La Jollan middens, but they are not abundant.
The La Jolla complex was initially characterized as the Shell Midden people by Malcolm J. Rogers, the region's pioneering archaeologist.
Subsequent investigators have sometimes proposed modified versions of Rogers' phase sequence, but the most striking characteristics of the complex may be its comparatively simple material remains and its long cultural continuity, at least in the San Diego region.
Two human skeletons, a male and a female, were found in La Jolla, California, in 1976; they date back at least 9,500 years.