Multiple choice general knowledge Which is the smallest country in the world Tuvalu (Polynesia) Nauru (Pasific island) Liechtenstein (Switzerland) Vatican City (Rome) Reveal answer Fill a bubble to check yourself D Correct answer Explanation Vatican City is the smallest independent state in the world by both area (0.44 sq km) and population. It is an enclave located within Rome, Italy. While Tuvalu and Nauru are also very small, they are larger than Vatican City.