UpAlphabetical listing of Places in Northern
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
| Obeia | city | Northern | Papua New Guinea | -9.61 | 148.73 | 830 | 596 |
| Oibo | city | Northern | Papua New Guinea | -8.08 | 147.39 | 2552 | 596 |
| Oiere | city | Northern | Papua New Guinea | -8.68 | 148.14 | 331 | 596 |
| Oieri | city | Northern | Papua New Guinea | -8.68 | 148.14 | 331 | 596 |
| Ointatandi | city | Northern | Papua New Guinea | -8.61 | 147.97 | 370 | 596 |
| Oisa | city | Northern | Papua New Guinea | -9.63 | 148.28 | 3349 | 596 |
| Oitatandi | city | Northern | Papua New Guinea | -8.61 | 147.97 | 370 | 596 |
| Old Bakumbari | city | Northern | Papua New Guinea | -8.53 | 148.22 | 0 | 333 |
| Ombi | city | Northern | Papua New Guinea | -8.88 | 147.98 | 843 | 596 |
| Ombisusu | city | Northern | Papua New Guinea | -8.88 | 147.98 | 843 | 596 |
| Onabasusu | city | Northern | Papua New Guinea | -8.59 | 147.93 | 364 | 596 |
| Onambatutu | city | Northern | Papua New Guinea | -8.16 | 147.82 | 830 | 596 |
| Ondagipitari | city | Northern | Papua New Guinea | -8.72 | 148.42 | 52 | 473 |
| Ondahari | city | Northern | Papua New Guinea | -8.68 | 148.10 | 830 | 596 |
| Ondoro | city | Northern | Papua New Guinea | -9.12 | 148.49 | 1669 | 596 |
| Ongahambo | city | Northern | Papua New Guinea | -8.87 | 148.05 | 1000 | 596 |
| Ongoho | city | Northern | Papua New Guinea | -8.70 | 148.11 | 830 | 596 |
| Orala | city | Northern | Papua New Guinea | -9.30 | 148.54 | 2011 | 596 |
| Orarasusu | city | Northern | Papua New Guinea | -8.77 | 147.97 | 830 | 596 |
| Orasusu | city | Northern | Papua New Guinea | -8.63 | 148.02 | 830 | 596 |
| Ordeno | city | Northern | Papua New Guinea | -8.97 | 148.45 | 1669 | 596 |
| Oreresan | city | Northern | Papua New Guinea | -9.35 | 149.18 | 0 | 370 |
| Orersan | city | Northern | Papua New Guinea | -9.35 | 149.18 | 0 | 370 |
| Oribiari | city | Northern | Papua New Guinea | -8.60 | 147.93 | 367 | 596 |
| Orotoaba | city | Northern | Papua New Guinea | -9.14 | 149.31 | 3 | 289 |
| Osako | city | Northern | Papua New Guinea | -8.59 | 147.91 | 830 | 596 |
| Oure | city | Northern | Papua New Guinea | -8.31 | 148.21 | 0 | 236 |
| Ovesa | city | Northern | Papua New Guinea | -9.43 | 148.72 | 830 | 596 |
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