Australia, officially known as the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands. It is the largest country in Oceania and the world’s sixth-largest country by total area.
Australia or Oceanian Countries
| Rank | Country (or dependent territory) |
Current population | Official figure (where available) |
Area (km²) |
| 1 |  Australia |
25,631,820 | 25,581,700 | 7,692,024 |
| 2 |  Papua New Guinea |
8,558,800 | 7,744,700 | 462,840 |
| 3 |  New Zealand |
4,795,886 | 5,129,400 | 270,467 |
| 4 |  Fiji |
896,445 | 867,000 | 18,274 |
| 5 |  Solomon Islands |
667,044 | 642,000 | 28,896 |
| 6 |  Vanuatu |
304,500 | 277,600 | 12,189 |
 New Caledonia (France) |
278,500 | 271,407 | 19,060 | |
 French Polynesia (France) |
275,918 | 275,918 | 4,167 | |
| 7 |  Samoa |
199,052 | 194,899 | 2,831 |
| Guam (US) | 172,400 | 159,358 | 540 | |
| 8 |  Kiribati |
120,100 | 113,400 | 811 |
| 9 |  Federated States of Micronesia |
103,000 | 102,300 | 702 |
| 10 |  Tonga |
100,651 | 103,300 | 747 |
 American Samoa (US) |
56,700 | 55,519 | 199 | |
 Northern Mariana Islands (US) |
56,200 | 53,883 | 477 | |
| 11 |  Marshall Islands |
55,500 | 54,900 | 181 |
| 12 |  Palau |
21,000 | 18,000 | 459 |
 Cook Islands (NZ) |
18,100 | 15,300 | 240 | |
 Wallis and Futuna (France) |
11,700 | 11,558 | 274 | |
| 13 |  Tuvalu |
10,640 | 11,300 | 26 |
| 14 |  Nauru |
10,084 | 10,900 | 21 |
 Norfolk Island (Australia) |
1,748 | 2,302 | 35 | |
 Niue (NZ) |
1,611 | 1,500 | 260 | |
 Tokelau (NZ) |
1,499 | 1,160 | 10 | |
 Pitcairn Islands (UK) |
50 | 57 | 5 | |
| Total | 41,909,794 |
Oceanian population by country (top 8).
- Australia (59.82%)
- Papua New Guinea (20.67%)
- New Zealand (11.51%)
- Fiji (2.18%)
- Solomon Islands (1.48%)
- Vanuatu (0.70%)
- New Caledonia (0.69%)
- French Polynesia (0.69%)
- Other (2.26%)
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