Collection place
- Ogilvie ranch, Star Valley, Gila County1
- Ogooue River region, Gabon1
- Ogun State, Nigeria75
- Ohio240
- Ohling Mound, Linn County, Oregon1
- Oiopel, Pohnpei, Senyavin Islands4
- Ojai, Ventura County, California10
- Ojinaga Municipality, Chihuahua, Mexico1
- Ojo Caliente, Cibola County, New Mexico33
- Ojo del Carbonero, Ahumada Municipality, Chihuahua14
- Ojo del Coyote, Ahumada Municipality, Chihuahua8
- Ojo del Mesquite, Ahumada Municipality, Chihuahua11
- Ojo del Palo Blanco, Ahumada Municipality, Chihuahua18
- Ojos Calientes de Santo Domingo, Ahumada Municipality, Chihuahua16
- Ojos de San Francisco, Janos Municipality, Chihuahua16
- Okaburura Village, Kitava Island, Trobriand Islands1
- Okaloosa County, Florida1
- Okanogan County, Washington6
- Okapa, Okapa District, Eastern Highlands Province, Papua New Guinea3
- Okavango area, Namibia5