Collection place
- Ocucaje Site Z, Ocucaje, Ica valley12
- Ocucaje, Site 16, Ocucaje, Ica valley72
- Ocucaje, Site 26, Ocucaje, Ica valley1
- Ocucaje, Site 28, Ocucaje, Ica valley7
- Ocucaje, Site 36, Ocucaje, Ica valley1
- Ocucaje, Site 38, Ocucaje, Ica valley19
- Ocumicho, Michoacan, Mexico83
- Odeceixe, Aljezur, Portugal7
- Odessus, ancient Thrace2
- Odisha State, India28
- Odžak, Bugojno, Federation of Bosnia and Herzegovina1
- Oeta, South coast of Papua New Guinea1
- Ofu Island, Manu'a Islands, American Samoa1
- Ofu, Manua Islands, American Samoa1
- Ogallala, Keith County, Nebraska2
- Ogbomosho, Oyo State, Nigeria8
- Ogburn Ranch, Shasta County, California1
- Ogilby, Imperial County, California5
- Ogilvie Ranch, Lassen County, California1
- Ogilvie ranch 2, Star Valley, Gila County1