| Sr. No. | Town and City | Region |
|---|
| 211 | Ongarue River | Manawatu-Whanganui |
| 212 | Ongarue Stream Road, Waimiha | Manawatu-Whanganui |
| 213 | Ongarue Village Road, Ongarue | Manawatu-Whanganui |
| 214 | Ongarue Waimiha Road, Ongarue | Manawatu-Whanganui |
| 215 | Ongarue Waimiha Road, Waimiha | Manawatu-Whanganui |
| 216 | Ongaruhe Stream | Waikato |
| 217 | Ongarui Close, Whalers Gate | Taranaki |
| 218 | Ongaruru | Gisborne |
| 219 | Ongatiti Stream | Waikato |
| 220 | Ongawanga Creek | Tasman |
| 221 | Ongaware Stream | Gisborne |
| 222 | Ongawari | Gisborne |
| 223 | Onge Street, Owhango | Manawatu-Whanganui |
| 224 | Ongionui Or Twelve Mile Creek | West Coast |
| 225 | Ongo Road, Hunterville | Manawatu-Whanganui |
| 226 | Ongo Stream | Manawatu-Whanganui |
| 227 | Ongohi Stream | Waikato |
| 228 | Ongoiere Stream | Waikato |
| 229 | Ongutukura Way, Oakura | Northland |
| 230 | Onhetoro | Canterbury |
| 231 | Onion Road, Horotiu | Waikato |
| 232 | Only Islands | Southland |
| 233 | Ono Street, Waikanae Beach | Wellington |
| 234 | Onohu | Bay Of Plenty |
| 235 | Onoke | Northland |
| 236 | Onoke Pa | Waikato |
| 237 | Onoke | Wellington |
| 238 | Onopopiti Bay, Arapaoa Island | Marlborough |
| 239 | Onslow Avenue, Taupiri | Waikato |
| 240 | Onslow Downs | Otago |
| 241 | Onslow Glacier | Canterbury |
| 242 | Onslow Hut (Steffan Memorial Hut) | Canterbury |
| 243 | Onslow Road, Bluff Hill | Hawke's Bay |
| 244 | Onslow Road, Khandallah | Wellington |
| 245 | Onslow Road, Papakura | Auckland |
| 246 | Onslow Road, Patutahi | Gisborne |
| 247 | Onslow Street, Dargaville | Northland |
| 248 | Onslow Street East, Ohingaiti | Manawatu-Whanganui |
| 249 | Onslow Street, Gore | Southland |
| 250 | Onslow Street, Kawerau | Bay of Plenty |
| 251 | Onslow Street, Newfield | Southland |
| 252 | Onslow Street, Ohingaiti | Manawatu-Whanganui |
| 253 | Onslow Street, Paeroa | Waikato |
| 254 | Onslow Street, Rockdale | Southland |
| 255 | Onslow Street, St Albans | Canterbury |
| 256 | Onslow Street West, Ohingaiti | Manawatu-Whanganui |
| 257 | Onslow View | Otago |
| 258 | Ontario Street, East Gore | Southland |
| 259 | Ontario Street, Kingston | Wellington |
| 260 | Onuku Road, Akaroa | Canterbury |
| 261 | Onukuhou Stream | Waikato |
| 262 | Onukuroa | Bay Of Plenty |
| 263 | Onukutara Place, Huntington | Waikato |
| 264 | Onukutauira Stream | Waikato |
| 265 | Onyx Place, Awatoto | Hawke's Bay |
| 266 | Onyx Place, Pukehangi | Bay of Plenty |
| 267 | Onyx Way, Hairini | Bay of Plenty |
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