Smallest Countries in the World: The top ten smallest countries, in square miles, as of 2012. 1. Vatican City0.17 2. Monaco0.75 3. Nauru8.11 4. Tuvalu10.04 5. San Marino23.63 6. Liechtenstein61.78 7.Saint Kitts and Nevis100.77 8. Maldives115.83 9. Malta122.01 10. Grenada132.82 NOTE: Country rankings of the type presented below cannot pretend to be definitive; instead they aspire only to provide the reader with an approximation of the high and low ends on a particular scale. Country data vary enormously depending on the sources, and the absence of reliable data on some countries requires their omission, which further skews the results. Only countries for which statistics were available in sources 1 and 2 figure in these lists. *Size refers to the total area of a country, which includes the land area plus bodies of water.Sources:1.The World Factbook.2. U.S. Census Bureau, International Database.