This is a list of the least populous countries. It includes only countries that retain a population less than 500,000, about the size of a medium city.| Rank | Country / Territory | Population | Date of estimate | % of World population | Source |
|---|---|---|---|---|---|
| 54 |  Malta | 417,608 | January 1, 2011 | 0.006% | Eurostat estimate |
| 53 |  Brunei | 399,000 | 2010 | 0.006% | UN estimate for 2010 |
| 52 |  Bahamas | 353,658 | May 3, 2010 | 0.005% | Official estimate |
| 51 |  Belize | 333,200 | Mid-2009 | 0.005% | Statistical Institute of Belize |
| 50 |  Iceland | 318,452 | January 1, 2011 | 0.004% | Statistics Iceland |
| 49 |  Maldives | 317,280 | 2010 | 0.004% | Official estimate |
| 48 |  Barbados | 273,000 | 2010 | 0.004% | UN estimate for 2010 |
| 47 |  Vanuatu | 240,000 | 2010 | 0.003% | UN estimate for 2010 |
| 46 |  Samoa | 187,032 | 2010 | 0.003% | Official estimate |
| 45 |  Guam | 180,000 | 2010 | 0.003% | UN estimate for 2010 |
| 44 |  Saint Lucia | 166,526 | May 10, 2010 | 0.002% | Preliminary census result |
| 43 |  São Tomé and Príncipe | 165,000 | 2010 | 0.002% | UN estimate for 2010 |
| 42 |  Curaçao | 142,180 | January 1, 2010 | 0.002% | Official estimate |
| 41 |  Saint Vincent and the Grenadines | 109,000 | 2010 | 0.002% | UN estimate for 2010 |
| 40 |  U.S. Virgin Islands | 109,000 | 2010 | 0.002% | UN estimate for 2010 |
| 39 |  Aruba | 107,000 | 2010 | 0.002% | UN estimate for 2010 |
| 38 |  Grenada | 104,000 | 2010 | 0.001% | UN estimate for 2010 |
| 37 |  Tonga | 104,000 | 2010 | 0.001% | UN estimate for 2010 |
| 36 |  Micronesia, Federated States of | 102,624 | April 4, 2010 | 0.001% | Preliminary census results |
| 35 |  Kiribati | 100,000 | 2010 | 0.001% | UN estimate for 2010 |
| 34 |  Jersey | 92,500 | December 31, 2009 | 0.001% | Official estimate |
| 33 |  Antigua and Barbuda | 89,000 | 2010 | 0.001% | UN estimate for 2010 |
| 32 |  Seychelles | 86,525 | July 1, 2010 | 0.001% | Official estimate |
| 31 |  Andorra | 84,082 | December 31, 2009 | 0.001% | Official estimate |
| 30 |  Isle of Man | 83,000 | 2010 | 0.001% | UN estimate for 2010 |
| 29 |  American Samoa | 68,000 | 2010 | 0.001% | UN estimate for 2010 |
| 28 |  Dominica | 68,000 | 2010 | 0.001% | UN estimate for 2010 |
| 27 |  Bermuda | 64,566 | July 1, 2010 | 0.001% | Official estimate |
| 26 |  Guernsey | 62,431 | March 31, 2010 | 0.001% | Official estimate |
| 25 |  Northern Mariana Islands | 61,000 | 2010 | 0.001% | UN estimate for 2010 |
| 24 |  Greenland | 56,452 | 2010 | 0.001% | Official estimate |
| 23 |  Cayman Islands | 54,878 | October 10, 2010 | 0.001% | Preliminary census result |
| 22 |  Marshall Islands | 54,305 | 2010 | 0.001% | Official estimate |
| 21 |  Saint Kitts and Nevis | 52,000 | 2010 | 0.001% | UN estimate for 2010 |
| 20 |  Faroe Islands | 48,596 | April 1, 2011 | 0.001% | Official statistics of the Faroe Islands |
| 19 |  Turks and Caicos Islands | 40,357 | 2010 | 0.0006% | Official estimate |
| 18 |  Sint Maarten | 37,429 | January 1, 2010 | 0.0005% | Official estimate |
| 17 |  Liechtenstein | 36,157 | December 31, 2010 | 0.0005% | Official estimate |
| 16 |  Monaco | 35,000 | 2010 | 0.0005% | UN estimate for 2010 |
| 15 |  San Marino | 31,887 | December 31, 2010 | 0.0004% | Monthly official estimate |
| 14 |  Gibraltar | 29,441 | 2010 | 0.0004% | [1] |
| 13 |  British Virgin Islands | 28,213 | 2008 | 0.0004% | Official estimate |
| 12 |  Cook Islands | 24,600 | December 2010 | 0.0003% | Official monthly estimate |
| 11 |  Palau | 20,000 | 0.0003% | UN estimate for 2010 | |
| 10 |  Anguilla | 15,236 | 2011 | 0.0002% | Official estimate |
| 9 |  Nauru | 10,000 | 0.0001% | UN estimate for 2010 | |
| 8 |  Tuvalu | 10,000 | 0.0001% | UN estimate for 2010 | |
| 7 |  Montserrat | 6,000 | 0.0001% | UN estimate for 2010 | |
| 6 |  Saint Helena, Ascension and Tristan da Cunha | 4,000 | 0.0001% | 2008 UN estimate for year 2010 | |
| 5 |  Falkland Islands | 3,000 | 0.00005% | UN estimate for 2010 | |
| 4 |  Niue | 1,500 | 0.00003% | UN estimate for 2010 | |
| 3 |  Tokelau | 1,100 | 0.00003% | UN estimate for 2010 | |
| 2 |  Vatican City | 500 | 0.00001% | UN estimate for 2010 | |
| 1 |  Pitcairn Islands | 50 | 0.000001% | UN estimate |