List of Oceanian countries by Area
| Source | The World Factbook |
| Date | 01 Dec 2020 |
| Country/Territory | Total area | Land area | Water area | Land area Share (%) | Rank | ||||
|---|---|---|---|---|---|---|---|---|---|
| sq km | sq mi | sq km | sq mi | sq km | Oceania | World | Oceania | World | |
| American Samoa | 224 | 86.5 | 224 | 86.5 | 0 | 0.00264 | 0.000150 | 19 | 215 |
| Ashmore and Cartier Islands | 5 | 1.93 | 5 | 1.93 | 0 | 0.00006 | 0.000003 | 32 | 249 |
| Australia | 7,741,220 | 2,988,901 | 7,682,300 | 2,966,151 | 58,920 | 90.5 | 5.16 | 1 | 6 |
| Christmas Island | 135 | 52.1 | 135 | 52.1 | 0 | 0.00159 | 0.000091 | 22 | 221 |
| Cocos (Keeling) Islands | 14 | 5.41 | 14 | 5.41 | 0 | 0.00016 | 0.000009 | 27 | 240 |
| Cook Islands | 236 | 91.1 | 236 | 91.1 | 0 | 0.00278 | 0.000158 | 18 | 214 |
| Coral Sea Islands | 3 | 1.16 | 3 | 1.16 | 0 | 0.00004 | 0.000002 | 34 | 252 |
| Fiji | 18,274 | 7,056 | 18,274 | 7,056 | 0 | 0.215 | 0.0123 | 6 | 156 |
| French Polynesia | 4,167 | 1,609 | 3,827 | 1,478 | 340 | 0.0451 | 0.00257 | 8 | 174 |
| Guam | 544 | 210 | 544 | 210 | 0 | 0.00641 | 0.000365 | 13 | 194 |
| Heard Island and McDonald Islands | 412 | 159 | 412 | 159 | 0 | 0.00485 | 0.000277 | 16 | 202 |
| Howland Island | 1.6 | 0.62 | 1.6 | 0.62 | 0 | 0.00002 | 0.000001 | 36 | 255 |
| Jarvis Island | 4.5 | 1.74 | 4.5 | 1.74 | 0 | 0.00005 | 0.000003 | 33 | 251 |
| Johnston Atoll | 2.63 | 1.02 | 2.63 | 1.02 | 0 | 0.00003 | 0.000002 | 35 | 253 |
| Kingman Reef | 1 | 0.39 | 1 | 0.39 | 0 | 0.00001 | 0.000001 | 37 | 256 |
| Kiribati | 811 | 313 | 811 | 313 | 0 | 0.00955 | 0.000545 | 10 | 186 |
| Marshall Islands | 181 | 69.9 | 181 | 69.9 | 0 | 0.00213 | 0.000122 | 20 | 216 |
| Micronesia, Federated States of | 702 | 271 | 702 | 271 | 0 | 0.00827 | 0.000471 | 12 | 191 |
| Midway Islands | 6.2 | 2.39 | 6.2 | 2.39 | 0 | 0.00007 | 0.000004 | 31 | 246 |
| Nauru | 21 | 8.11 | 21 | 8.11 | 0 | 0.00025 | 0.000014 | 26 | 239 |
| New Caledonia | 18,575 | 7,172 | 18,275 | 7,056 | 300 | 0.215 | 0.0123 | 5 | 155 |
| New Zealand | 268,838 | 103,799 | 264,537 | 102,138 | 4,301 | 3.12 | 0.178 | 3 | 76 |
| Niue | 260 | 100 | 260 | 100 | 0 | 0.00306 | 0.000175 | 17 | 212 |
| Norfolk Island | 36 | 13.9 | 36 | 13.9 | 0 | 0.00042 | 0.000024 | 24 | 234 |
| Northern Mariana Islands | 464 | 179 | 464 | 179 | 0 | 0.00547 | 0.000312 | 14 | 196 |
| Palau | 459 | 177 | 459 | 177 | 0 | 0.00541 | 0.000308 | 15 | 197 |
| Palmyra Atoll | 11.9 | 4.59 | 11.9 | 4.59 | 0 | 0.00014 | 0.000008 | 29 | 242 |
| Papua New Guinea | 462,840 | 178,703 | 452,860 | 174,850 | 9,980 | 5.33 | 0.304 | 2 | 55 |
| Pitcairn Islands | 47 | 18.1 | 47 | 18.1 | 0 | 0.00055 | 0.000032 | 23 | 233 |
| Samoa | 2,831 | 1,093 | 2,821 | 1,089 | 10 | 0.0332 | 0.00189 | 9 | 177 |
| Solomon Islands | 28,896 | 11,157 | 27,986 | 10,805 | 910 | 0.330 | 0.0188 | 4 | 143 |
| Tokelau | 12 | 4.63 | 12 | 4.63 | 0 | 0.00014 | 0.000008 | 28 | 241 |
| Tonga | 747 | 288 | 717 | 277 | 30 | 0.00845 | 0.000481 | 11 | 189 |
| Tuvalu | 26 | 10.0 | 26 | 10.0 | 0 | 0.00031 | 0.000017 | 25 | 237 |
| Vanuatu | 12,189 | 4,706 | 12,189 | 4,706 | 0 | 0.144 | 0.00818 | 7 | 162 |
| Wake Island | 6.5 | 2.51 | 6.5 | 2.51 | 0 | 0.00008 | 0.000004 | 30 | 245 |
| Wallis and Futuna | 142 | 54.8 | 142 | 54.8 | 0 | 0.00167 | 0.000095 | 21 | 220 |
| Oceania | 8,563,345 | 3,306,326 | 8,488,554 | 3,277,449 | 74,791 | 5.70 | 7 | ||