- CA-SCl-1 (Ponce Mound), Mountain View, Santa Clara County12 objects
- Mountain View, Santa Clara County, California12 objects
- Sacramento, Sacramento County, California12 objects
- CA-Sac-122 (Eichenberger Mound), Sacramento County, California10 objects
- CA-Sac-28 (Strawberry Mound), Sacramento, Sacramento County7 objects
- San Francisco County, California7 objects
- CA-CCo-141, Palm Tract, Contra Costa County6 objects
- Palm Tract, Contra Costa County, California6 objects
- San Joaquin County, California6 objects
- Unincorporated eastern Contra Costa County, California6 objects
- Bayview, San Francisco, San Francisco County5 objects
- CA-Sac-107 (Windmiller Mound), Sacramento County, California5 objects
- Colusa County, California5 objects
- San Francisco, San Francisco County, California5 objects
- CA-Col-3 (Sandhill site), Colusa County, California4 objects
- CA-SFr-7, San Francisco County, California4 objects
- Fremont, Alameda County, California4 objects
- CA-CCo-259, Rodeo, Contra Costa County3 objects
- CA-Sac-127 (Augustine site), Sacramento County, California3 objects
- CA-Sac-31 (Joe Mound #1), Sacramento, Sacramento County3 objects