- Lake County, California30 objects
- Colusa County, California29 objects
- CA-Col-3 (Sandhill site), Colusa County, California28 objects
- Chiles Valley, Napa County, California27 objects
- CA-Nap-18, Chiles Valley, Napa County24 objects
- CA-Sac-126 (Booth Mound), Sacramento County, California21 objects
- CA-Lak-75, Lake County, California19 objects
- CA-Nap-1 (Goddard Mound), Napa Valley, Napa County18 objects
- Oakville area, Napa Valley, Napa County18 objects
- Happy Canyon, Santa Barbara County, California16 objects
- CA-Sac-2 or 3 or 6 ('Johnson Mound'), Sacramento County, California14 objects
- CA-Sac-6, Sacramento County, California12 objects
- CA-Sac-121 (Goethe #2), Sacramento County, California11 objects
- Northeastern California9 objects
- CA-Sac-28 (Strawberry Mound), Sacramento, Sacramento County8 objects
- Dalton Mound, Sacramento County, California8 objects
- Dalton Site, Sacramento County, California8 objects
- Northern Sierras, Northern California8 objects
- Sulphur Bank, Lake County, California5 objects
- Placer County, California4 objects