The World's Biggest vs. Smallest Country: How Big Is the Gap, Really?

Pick any hundred people at random from Earth's roughly 8.2 billion residents, and odds are none of them has ever set foot in the world's smallest country. That's because Vatican City is home to fewer people than a single large apartment building — while India, the most populous nation on the planet, adds more people to the world each year than Vatican City's entire population could ever hope to reach.

This report puts the two extremes side by side: the country with the most people on Earth, and the country (or countries, depending on how you define "country") with the fewest — using the same kind of public datasets WhatsThePop uses everywhere else on this site.

As of 2025, India's population stands at roughly 1.46 billion people (World Bank Open Data), spread across 3,287,590 km² — an area smaller than the U.S. states of Alaska and Texas combined. That works out to an average of about 445 people per square kilometer.

India hasn't always held this title. For most of modern history, China was the world's most populous country. That changed around April 2023, when the UN Department of Economic and Social Affairs (UN DESA) projected, in its World Population Prospects 2022 revision, that India's population had overtaken China's. China's population is now around 1.41 billion (World Bank Open Data, 2025) and has begun to shrink slightly year over year, while India's continues to grow.

Put another way: roughly 1 in every 6 people alive today lives in India.

Finding the world's smallest country by population means making a choice first, because Vatican City — an independent city-state ruled by the Pope — isn't a United Nations member. If you count every internationally recognized sovereign state, Vatican City wins by a wide margin: about 764 residents (CIA World Factbook), most of them clergy, Swiss Guards, and Holy See staff, many of whom don't live there full-time. It's also the smallest country by area, at just 0.49 km² — small enough to walk across in about 15 minutes.

Restrict the list to United Nations member states, and the title goes to Tuvalu, a chain of coral atolls in the Pacific Ocean with a population of about 11,000 people (World Bank Open Data) spread across just 26 km² of land — roughly the size of a large airport. Tuvalu is also one of the countries most immediately threatened by rising sea levels, with much of its land sitting less than 2 meters above sea level.

India's population is more than 1.9 million times larger than Vatican City's, and about 133,000 times larger than Tuvalu's. By land area, India is roughly 6.7 million times the size of Vatican City — a gap large enough to be genuinely hard to visualize. If every Vatican City resident tried to fill one section of a mid-size football stadium, they'd need help from the section next door; India's population could fill that same stadium more than 20,000 times over.

Population size mostly comes down to two things: land area and history. Countries like India and China sit on large, fertile landmasses that have supported dense agricultural societies for thousands of years, and both remained — or were reunified as — large states that inherited that scale.

Microstates like Vatican City exist for entirely different reasons, usually historical or religious sovereignty rather than the capacity to support a large population. Vatican City was established by the 1929 Lateran Treaty specifically to guarantee the Pope's independence from Italy, not to function as a nation-state with its own economy and workforce. Small island nations like Tuvalu, meanwhile, are simply constrained by the physical size of the land they sit on.

Extremes aside, population is heavily concentrated worldwide: the ten most populous countries are home to more than half of all people on Earth (UN DESA, World Population Prospects 2024), while dozens of small states — island nations, microstates, and city-states — share only a tiny fraction of the remaining population between them.

Curious where your own country lands on this spectrum? Compare it with India, Tuvalu, or any other country covered on WhatsThePop.