Which has more people — Nigeria or Russia? Indonesia or Brazil? The Most Populous Countries Quiz tests how well you really know where the world’s people live. Play a quick More or Fewer face-off, pick the most populous of four, or hunt down the world’s population giants on an interactive map. It runs right here in your browser, free, with no sign-up.
India has now overtaken China as the world’s most populous country, with about 1.45 billion people — and together those two nations are home to more than a third of all humanity. This quiz turns those facts into a game: five modes, a streak multiplier, a Speed Run against the clock, and a review of every match-up you missed. A local leaderboard remembers your best runs.
It is part of our growing set of geography quizzes — the same fast, modern engine behind the Countries of the World Quiz, World Capitals Quiz, and Largest Countries by Area Quiz. Scroll down for the ten most populous countries and answers to common questions.
Play the Most Populous Countries Quiz
How to play
- More or Fewer — two countries appear side by side. Tap the one with more people. Every match-up has a clear winner, so it is all about your instinct for population.
- Which is Most Populous? — four countries, one has the biggest population. Pick it. The decoys are always smaller, but often close enough to make you think.
- Locate the Giants — a top-40 country is named with its population rank. Find it and tap it on the world map.
- Speed Run — rapid-fire More or Fewer against the clock. Build a streak to multiply your score.
- Daily Challenge — six comparisons that are the same for everyone in the world that day. Finish it to keep your daily streak alive and share your result as an emoji grid.
Prefer to study first? Learn mode maps the twenty most populous countries, ranks them with real figures, and shows just how concentrated the world’s population really is.
The 10 most populous countries
These figures are total population for sovereign countries, using the latest World Bank data (mostly 2024). Just these ten nations are home to well over half of everyone on Earth:
- India — 1,450,935,791
- China — 1,408,975,000
- United States — 340,110,988
- Indonesia — 283,487,931
- Pakistan — 251,269,164
- Nigeria — 232,679,478 (Africa’s most populous country)
- Brazil — 211,998,573
- Bangladesh — 173,562,364
- Russia — 143,533,851
- Ethiopia — 132,059,767
A few tips for the quiz: do not trust land area as a guide to population — tiny Bangladesh has more people than enormous Russia, and India is far more populous than Canada despite being a third of its size. Watch out for fast-growing African nations like Nigeria, Ethiopia, and the DR Congo, which now outrank many long-familiar European countries, and remember that several of the world’s largest countries by area (Canada, Australia, Kazakhstan) have surprisingly small populations.
Data & method
Population figures come from World Bank Open Data (indicator SP.POP.TOTL, total population, latest available year — mostly 2024; licence CC BY 4.0). Country names and flags come from the open mledoze/countries dataset (ODbL licence), and the interactive world map is built from Natural Earth via the world-atlas TopoJSON (public domain). All of the data is bundled into the quiz at build time, so it loads instantly and needs no third-party connection while you play. The ranking covers the world’s independent countries by total population.
Want to keep exploring? Dig into the numbers behind the world’s biggest populations with our Population Explorer, compare any two nations side by side with the Country Comparison tool, or test your sense of scale with the Largest Countries by Area Quiz.
Frequently asked questions
What is the most populous country in the world?
India is now the most populous country in the world, with about 1.45 billion people. It overtook China — long the world’s most populous nation — in the mid-2020s. Each of the two countries is home to roughly one in six people on Earth.
What are the 10 most populous countries?
In order of population: India, China, the United States, Indonesia, Pakistan, Nigeria, Brazil, Bangladesh, Russia, and Ethiopia. India and China each have over a billion people; together the top ten are home to well over half of the world’s population.
Is the quiz ranked by population or by area?
This quiz ranks countries by population — the total number of people living in each one. That is very different from land area: Russia and Canada are the largest countries by area but rank ninth and far lower by population, while densely populated Bangladesh is small in area yet sits in the global top ten.
What is the daily challenge?
Every day the quiz generates six population face-offs that are identical for everyone in the world that day. Finish them to keep a daily streak going and share your score as a spoiler-free emoji grid — so you can compare results with friends without giving away the answers.
Is the quiz free, and does it work on mobile?
Yes to both. It is completely free with no sign-up, and it is built mobile-first — the comparison cards, answer buttons, and world map all scale to a phone screen with finger-sized tap targets. Your scores and daily streak are saved on your own device.
Where does the population data come from?
Population figures come from World Bank Open Data (indicator SP.POP.TOTL, latest available year, CC BY 4.0). Country names and flags come from the open mledoze/countries dataset (ODbL licence), and the world map is built from Natural Earth via the world-atlas TopoJSON (public domain). The data is bundled into the quiz, so it loads instantly and works without any third-party connection.
