Regions of New Zealand
- Owhakaora Stream
- Owersby
- Owen Valley
- Owens Creek
- Owen River
- Owen River
- Owen Junction
- Horomamae / Owen Island
- Owen Head
- Owen Creek
- Mount Owen
- Mount Owen
- Oware Stream
- Owaka Valley
- Owaka River
- Owaka
- Owai Stream
- Owairua
- Owairua
- Owairaka Stream
- Owae Stream
- Overseen Peak
- Overhead Cone
- Overdale
- Oven Hill
- Ouwe
- Outram
- The Outpost
- Ouse Stream
- River Ouse
- Ouruhia
- Ouri Stream
- Ourawera Stream
- Ounuaroa River
- Ounatae
- Ouki Creek
- Ouewheki
- Ouemuia
- Oue
- Oue
- Oue
- Ouaha
- Otuwhero River
- Otututu River
- Otutokonui
- Otutapu
- Oturi Lake
- Oturia
- Oturere Stream
- Oturehua
- Otupua Stream
- Otupoto Stream
- Otupae
- Otunui Stream
- Otumou Stream
- Otumore
- Otumoetai
- Otumatua Point
- Otumangu
- Otumakioi
- Otukua Creek
- Otukou
- Otukou
- Otukotere
- Otukoroiti
- Otukopiri
- Otukere Stream
- Otukaiata
- Otuhoto
- Otuhoe
- Lake Otuhie
- Otuhi
- Otuhangatoi
- Otueta Stream
- Otu Bay
- Otuaua Stream
- Otuatakahi Stream
- Otuareiawa Stream
- Otu
- Otto River
- Otterson Stream
- Otterson
- Ototoka Stream
- Ototoa Lake
- Otoru
- Otoro Stream
- Otorokua Point
- Otorohanga District
- Otorohanga
- Otorohaea
- Otoroa
- Otoro
- Otope Stream
- Otonga Station
- Otonga Point
- Otonga
- Otomiro River
- Otokoro Stream
- Otoko River
- Otoko
- Otoki Stream
- Otokia Creek
- Otokia
- Otohuao
- Otiria
- Otira River
- Otiranui
- Otira
- Otipua
- Otipi
- Otikoki
- Otiki
- Otianga
- Otiake River
- O te Tiringa Stream
- Otere River
- Oterei River
- Oterei
- Oterawhanga
- Oteranga Stream
- Oteranga Bay
- Oteramika Creek
- Otepo
- Otematata Station
- Ote Makura River
- Otekura
- Otekaieke River
- Otekaieke Hill
- Otekaieke
- Otehe Point
- Otehake River
- Oteau
- Oteao Stream
- Otawhiti
- Otawhao Stream
- Otawa
- Otautu
- Otautau Stream
- Otautau
- Otauroa
- Otaupari Stream
- Otaua Stream
- Otaua
- Otatoki Creek
- Otatara
- Otata Island
- Otari
- Otarawao
- Otaraoa
- Otaranoho
- Otarama
- Otaraia Hill
- Otaraia
- Otara
- Otara
- Otapu Creek
- Otapiri Stream
- Otapiri Peak
- Otapiri Gorge
- Otanomomo
- Otangimoana Stream
- Otangihaku
- Otangaue
- Otangaroa
- Otanewainuku
- Otaneuri
- Otane Stream
- Otanerito Bay
- Otanerau Bay
- Otanerau
- Otane
- Otane
- Otanau Stream
- Otamita Stream
- Otamita
- Otamawairua
- Otamauri Stream
- Otamauri
- Otamati
- Otamatea River
- Otamateanui Stream
- Otamatea River
- Otamatea County
- Otamatea Channel
- Otamatapaio River
- Otamatakau River
- Otamariki
- Otamarakau
- Otamarahu Stream
- Otamaraho Stream
- Otamapotiki
- Otama Creek
- Otama
- Otama
- Otaku
- Otakowai Stream
- Otakou
- Otakoha River
- Otakoe Creek
- Otaki River