When there is the biggest Country in the world, there is also the smallest one. And again, I find this at the informative website of worldatlas.com. The smallest country in the world is Vatican City which has 0.44 sq km or 0.17 sq miles which is followed by Monaco 1.95 sq km, Nauru 21.2 sq km, Tuvalu 26 sq km, San Marino 61 sq km, Marshall Islands 160 sq km, Seychelles 270 sq km, Maldives 270 sq km and St. Kitts & Nevis 360 sq km. To know more about these things, just visit worldatlas.com and discover more with world geography.