Oceania
With population over 41 million Oceania is the smallest in land area and the second smallest in population after Antarctica.
There is:
Australia with Canberra as a capital
Papua New Guinea with Port Moresby as a capital
New Zealand with Wellington as a capital
Fiji with Suva as a capital
Solomon Islands with Honiara as a capital
Vanuatu with Port Vila as a capital
New Caledonia with Nouméa as a capital
French Polynesia with Papeete as a capital
Samoa with Apia as a capital
Guam with Hagåtña as a capital
Kiribati with Tarawa as a capital
Federated States of Micronesia with Palikir as a capital
Tonga with Nukuʻalofa as a capital
American Samoa with Pago Pago as a capital
Northern Mariana Islands with Saipan as a capital
Marshall Islands with Majuro as a capital
Palau with Ngerulmud as a capital
Cook Islands with Avarua as a capital
Wallis and Futuna with Matā'Utu as a capital
Tuvalu with Funafuti as a capital
Nauru with Yaren as a capital
Norfolk Island with Kingston as a capital
Niue with Alofi as a capital
Tokelau
Pitcairn Islands with Adamstown as a capital