- California19 objects
- North America19 objects
- The Americas19 objects
- United States19 objects
- San Francisco Bay Area, California16 objects
- CA-CCo-138, Oakley, Contra Costa County15 objects
- Contra Costa County, California15 objects
- Oakley, Contra Costa County, California15 objects
- North Central California3 objects
- Northern California3 objects
- San Joaquin County, California3 objects
- CA-SJo-68, San Joaquin County, California2 objects
- CA-Nap-14 (Las Trancas site), Napa Valley, Napa County1 objects
- CA-SJo-NL-4, Union Island, San Joaquin County1 objects
- Lower Napa Valley, Napa County, California1 objects
- Napa County, California1 objects
- Napa Valley, Napa County, California1 objects
- Union Island, San Joaquin County, California1 objects