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The Cyclopedia of New Zealand [Otago & Southland Provincial Districts]
O
O
| Oamaru | 498–1105 |
| Ocean Beach | 881 |
| Old Colonists, Dunedin | 372 |
| Old Dunedin | 57 |
| Ophir | 627 |
| Oporo | 919 |
| Orepuki | 947 |
| Oreti Plains | 996 |
| Otago Harbour Board | 115 |
| Otago M.L.C.'s | 73 |
| Otago Provincial District- | 3 |
| Agricultural and Pastoral | 20 |
| Before the Settlement | 3 |
| Boundaries and Areas | 7 |
| Commercial | 27 |
| Otago Provincial District-cont'd— | |
| Communication | 13 |
| Comparisons | 5 |
| Ecclesiastical | 19 |
| Education | 16 |
| Forests | 13 |
| Industrial | 23 |
| Lakes | 12 |
| Local Government | 15 |
| Mining | 25 |
| Mountains | 8 |
| Rivers and Harbours | 10 |
| Scenery and Climate | 29 |
| The Future | 30 |
| Towns | 28 |
| Valleys and Plains | 10 |
| Otakau | 924 |
| Otakou | 583 |
| Otama | 1052 |
| Otapiri Gorge | 994 |
| Otara | 905 |
| Otatara | 906 |
| Otautau | 961 |
| Otekaike | 571 |
| Otiake | 572 |
| Otokaia | 654 |
| Outram | 641 |
| Owaka | 747 |