| Name | Country | Feature class | Latitude | Longitude | |
|---|---|---|---|---|---|
1801  | Okaramio | New Zealand, Marlborough Marlborough District | populated place | S 41° 25′ 0'' | E 173° 46′ 0'' |
1802  | Okarahia Stream Okarahia | New Zealand, | stream | S 42° 34′ 0'' | E 173° 30′ 0'' |
| 1803 | Okapua Creek | New Zealand, | stream | S 46° 1′ 0'' | E 168° 53′ 0'' |
1804  | Okapea | New Zealand, Manawatu-Wanganui | mountain | S 39° 36′ 0'' | E 175° 38′ 0'' |
| 1805 | Okaparu Reef Okorapu Reef | New Zealand, | reef(s) | S 37° 35′ 0'' | E 176° 22′ 0'' |
| 1806 | Okaiterua Stream | New Zealand, | stream | S 45° 50′ 0'' | E 168° 23′ 0'' |
| 1807 | Okains Peak Okains,Poaiiha | New Zealand, Canterbury Christchurch City | peak | S 43° 45′ 0'' | E 172° 59′ 0'' |
| 1808 | Okains Bay  Kawatea,Okain,Okain Bay,Okain's,Okane's,Okeina,Oken's Bay,Opara,Poaiiha | New Zealand, | bay | S 43° 41′ 10'' | E 173° 4′ 27'' |
| 1809 | Okains Bay Okains | New Zealand, Canterbury Christchurch City | populated place | S 43° 43′ 0'' | E 173° 2′ 0'' |
| 1810 | Okaihau | New Zealand, Northland Far North District | populated place population 324 | S 35° 19′ 0'' | E 173° 47′ 0'' |
| 1811 | Okaihae | New Zealand, Manawatu-Wanganui Ruapehu District | mountain | S 38° 50′ 0'' | E 175° 12′ 0'' |
| 1812 | Okaiepi | New Zealand, Manawatu-Wanganui | hill | S 39° 52′ 0'' | E 175° 19′ 0'' |
| 1813 | Okaiawa | New Zealand, Taranaki Region South Taranaki District | populated place | S 39° 32′ 0'' | E 174° 12′ 0'' |
| 1814 | Okahu Stream Okehu | New Zealand, | stream | S 39° 21′ 0'' | E 173° 46′ 0'' |
| 1815 | Okahu Stream Okaku River | New Zealand, | stream | S 35° 57′ 0'' | E 174° 0′ 0'' |
| 1816 | Okahu River Okahu | New Zealand, | stream | S 38° 35′ 0'' | E 176° 47′ 0'' |
| 1817 | Okahurea | New Zealand, Manawatu-Wanganui Ruapehu District | mountain | S 39° 27′ 0'' | E 175° 11′ 0'' |
| 1818 | Okahukura Stream | New Zealand, | stream | S 38° 18′ 0'' | E 175° 21′ 0'' |
1819  | Okahukura Station | New Zealand, Manawatu-Wanganui Ruapehu District | railroad station | S 38° 48′ 0'' | E 175° 14′ 0'' |
| 1820 | Okahukura Okahukua | New Zealand, Manawatu-Wanganui Ruapehu District | populated place | S 38° 47′ 0'' | E 175° 13′ 0'' |
| 1821 | Okahuata | New Zealand, Bay of Plenty Opotiki District | mountain | S 38° 19′ 0'' | E 177° 22′ 0'' |
| 1822 | Okahu Red Head Island | New Zealand, | island | S 35° 12′ 0'' | E 174° 12′ 0'' |
| 1823 | Okaha Okaka | New Zealand, Auckland Auckland | hill | S 36° 26′ 0'' | E 174° 14′ 0'' |
| 1824 | Oira Stream Oira Creek | New Zealand, | stream | S 37° 6′ 0'' | E 174° 55′ 0'' |
| 1825 | Oio | New Zealand, Manawatu-Wanganui Ruapehu District | populated place | S 39° 3′ 0'' | E 175° 25′ 0'' |
| 1826 | Oinga Lake Oingo Lake | New Zealand, | lake | S 39° 34′ 0'' | E 176° 45′ 0'' |
| 1827 | Ohutu Stream | New Zealand, | stream | S 39° 39′ 0'' | E 176° 3′ 0'' |
| 1828 | Ohutu | New Zealand, Manawatu-Wanganui | mountain | S 39° 36′ 0'' | E 176° 8′ 0'' |
| 1829 | Ohurutehe | New Zealand, Waikato Region | mountain | S 38° 59′ 0'' | E 176° 0′ 0'' |
| 1830 | Ohura River | New Zealand, | stream | S 39° 3′ 0'' | E 175° 4′ 0'' |
| 1831 | Ohurakura Stream | New Zealand, | stream | S 39° 14′ 0'' | E 176° 44′ 0'' |
| 1832 | Ohura-iti | New Zealand, | stream | S 39° 3′ 0'' | E 175° 2′ 0'' |
| 1833 | Ohura Ohura Town District | New Zealand, Manawatu-Wanganui Ruapehu District | populated place population 126 | S 38° 50′ 0'' | E 174° 59′ 0'' |
| 1834 | Ohungaora | New Zealand, Waikato Region | hill | S 38° 34′ 0'' | E 174° 57′ 0'' |
| 1835 | Ohuia Lagoon Ohuia,Ohuia Lake | New Zealand, | lagoon | S 39° 3′ 0'' | E 177° 29′ 0'' |
| 1836 | Ohuatahi Ohuitahi | New Zealand, Northland Whangarei | hill | S 35° 42′ 0'' | E 174° 29′ 0'' |
| 1837 | Ohotu | New Zealand, Manawatu-Wanganui Rangitikei District | populated place | S 39° 42′ 42'' | E 175° 50′ 20'' |
| 1838 | Ohope Beach Ohope | New Zealand, Bay of Plenty Whakatane District | populated place population 3,250 | S 37° 58′ 30'' | E 177° 4′ 33'' |
| 1839 | Ohope Beach | New Zealand, Auckland | beach | S 37° 58′ 0'' | E 177° 2′ 0'' |
| 1840 | Ohoka | New Zealand, Canterbury Waimakariri District | populated place | S 43° 22′ 0'' | E 172° 34′ 0'' |
| 1841 | Mount Oho | New Zealand, Otago Central Otago District | mountain | S 44° 59′ 0'' | E 169° 16′ 0'' |
| 1842 | Ohiwai | New Zealand, Waikato Region Thames-Coromandel District | mountain | S 37° 5′ 0'' | E 175° 49′ 0'' |
| 1843 | Ohiwa Harbour | New Zealand, | harbor(s) | S 38° 0′ 0'' | E 177° 6′ 0'' |
| 1844 | Ohiti | New Zealand, Hawke's Bay Region Wairoa District | hill | S 39° 3′ 0'' | E 177° 47′ 0'' |
| 1845 | Ohirea | New Zealand, Waikato Region | mountain | S 38° 31′ 0'' | E 175° 22′ 0'' |
| 1846 | Ohirangi | New Zealand, Auckland Auckland | populated place | S 36° 42′ 0'' | E 174° 27′ 0'' |
| 1847 | Ohingaroa | New Zealand, Marlborough Marlborough District | populated place | S 41° 15′ 0'' | E 173° 53′ 0'' |
| 1848 | Ohingaiti | New Zealand, Manawatu-Wanganui Rangitikei District | populated place | S 39° 51′ 46'' | E 175° 42′ 21'' |
| 1849 | Ohinewhiro | New Zealand, Waikato Region | mountain | S 38° 40′ 0'' | E 174° 51′ 0'' |
| 1850 | Ohinewai Lake | New Zealand, | lake | S 37° 29′ 0'' | E 175° 10′ 0'' |
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