Collection place
- 16-18 miles above Blue Lake, Mad River, Humboldt County12 objects
- 6 miles southeast of Willcox, Willcox Playa, Cochise County4 objects
- 7 miles SE of Carson City, Carson City County, Nevada2 objects
- A'men Lake, Del Norte County, California1 objects
- AZ-Cornfields-NL-8 (Ruin 40), Cornfields District, Apache County1 objects
- Aberdeen, Grays Harbor County, Western Washington1 objects
- Abuya, Culiacán Municipality, Sinaloa1 objects
- Acaxochitlán region, Hidalgo, Mexico2 objects
- Acaxochitlán, Hidalgo, Mexico1 objects
- Acoma, Cibola County, New Mexico63 objects
- Acomita, Cibola County, New Mexico27 objects
- Adams Ranch, Calaveras County, California1 objects
- Adin, Modoc County, California3 objects
- Admiralty Island, Skagway-Hoonah-Angoon Borough, Alaska2 objects
- Admiralty Islands, Manus Province, Bismarck Archipelago22 objects
- Adobe Meadows, Mono County, California1 objects
- Affiliated Colleges, San Francisco, San Francisco County51 objects
- Aguacatán, Huehuetenango, Guatemala15 objects
- Aguascalientes, Mexico2 objects
- Ahwahnee, Madera County, California23 objects