5 Smallest Countries By Area In The World Rate this post 5 Smallest Countries By Area In The World S. No. Country Area (In km²) 1. Vatican 0.4 km² 2. Monaco 2.0 km² 3. Gibraltar 6.8 km² 4. Tokelau 12.2 km² 5. Cocos Islands 14.2 km² Source: Wikipedia Sharing Is Caring: