- California41 objects
- North America41 objects
- The Americas41 objects
- United States41 objects
- CA-Nap-1 (Goddard Mound), Napa Valley, Napa County21 objects
- Middle Napa Valley, Napa County, California21 objects
- Napa County, California21 objects
- Napa Valley, Napa County, California21 objects
- Oakville area, Napa Valley, Napa County21 objects
- San Francisco Bay Area, California21 objects
- North Central California20 objects
- Northern California20 objects
- Sacramento County, California19 objects
- CA-Sac-16 (Bennet Mound), Sacramento County, California17 objects
- CA-Sac-122 (Eichenberger Mound), Sacramento County, California2 objects
- CA-Yol-54, Yolo County, California1 objects
- Elk Slough, Yolo County, California1 objects
- Yolo County, California1 objects