- North America21 objects
- The Americas21 objects
- United States21 objects
- Churchill County, Nevada14 objects
- Nevada14 objects
- Humboldt Lake region, Churchill County, Nevada8 objects
- NV-Ch-15, Churchill County, Nevada8 objects
- California7 objects
- NV-Ch-18 (Lovelock Cave), Churchill County, Nevada6 objects
- CA-Sac-2 or 3 or 6 ('Johnson Mound'), Sacramento County, California5 objects
- CA-Sac-6, Sacramento County, California5 objects
- North Central California5 objects
- Northern California5 objects
- Sacramento County, California5 objects
- Alameda County, California2 objects
- San Francisco Bay Area, California2 objects
- USA-NL-10, Alameda County2 objects