96 Fun Facts About World Population

Which island, home to more than 150 million people, is the most populous on Earth?

Java packs more than half of its country's population onto about 7% of its land area, and it holds the capital that the government is now trying to relieve.

Which country recorded its first population fall since 1961 in 2022, the year the world passed eight billion?

China's population peaked in 2022 and has started to fall, and UN projections suggest it could drop below one billion before the end of the century.

Which country had the oldest population of any large nation in 2022, with over 29% of its people aged 65 or more?

Japan combines one of the world's longest life expectancies with decades of low birth rates, and its elderly have outnumbered its children since 1997.

Which country's fertility rate fell to 0.72 births per woman in 2023, the lowest in the world?

South Korea's deaths have outnumbered its births every year since 2020, and in Seoul the rate has sunk even lower, to about 0.55.

Which continent has the youngest population in the world, with a median age of under 20 years?

Africa's youth is driving its growth: UN projections see it reaching about 3.8 billion people by 2100, more than a third of humanity.

Nearly nine in ten people live to the north of which line of latitude?

The Equator splits humanity very unevenly because the Northern Hemisphere holds about two-thirds of the planet's land, leaving under a billion people south of the line.

Which pandemic made the world's population shrink during the 14th century, killing a third or more of Europeans?

The Black Death killed so many labourers that landowners had to offer wages and money rents to keep their tenants, loosening the old system of labour services.

Emilio Palma, the first person born in Antarctica, arrived in 1978 at a base run by which country?

Argentina flew his mother to its Esperanza Base late in her pregnancy, and at least ten more children have since been born on the continent.

Which country passed 40 million people only in 2023, with immigration the main driver of its growth?

Canada added its 41st million within about a year of its 40th, a surge swollen by temporary residents such as students and workers, who made up about 6% of the population by 2023.

Which is the most populous country in Europe, although its numbers have been falling?

Russia has more people than any other European country, yet it is shrinking because deaths have outnumbered births there in most years since the Soviet Union broke up.

Danica May Camacho, one of the symbolic 'seven-billionth' babies chosen in 2011, was born in which country?

The Philippines' Danica May Camacho was one of several symbolic babies named around the world, since nobody could know which birth really took the count to seven billion.

Adnan Mević, the UN's symbolic six-billionth person, was born in 1999 in which city, besieged earlier that decade?

Sarajevo's Adnan Mević was welcomed at Koševo Hospital by UN Secretary-General Kofi Annan, who was in the city to monitor the peace agreement that had ended the war.

Which is the only country in the world with fewer than 1,000 residents?

Vatican City grants citizenship with the job rather than by birth, so hundreds of its citizens live outside it, among them papal diplomats posted abroad and cardinals based in Rome.

Which sovereign country is the most densely populated in the world?

Monaco packs about 38,000 people into two square kilometres, and most of them are foreigners: fewer than a quarter of its residents are Monégasque.

Spread over all Earth's land, the 8.2 billion people alive in 2025 average roughly how many per square kilometre?

50 per km² is the right order of magnitude, though the average hides a very uneven spread: about 60% of all people live in Asia alone.

Which South Asian country of over 170 million people is the most densely populated large country in the world?

Bangladesh is crowded because almost all of it is river delta: it covers most of the plain where the Ganges and Brahmaputra reach the sea.

Which special administrative region packs roughly 700,000 people into 33 square kilometres, the densest territory on Earth?

Macau, a Portuguese colony until its 1999 handover, has built two-thirds of its total area on land reclaimed from the sea.

Which self-governing Danish territory, home to about 56,000 people, is the least densely populated country in the world?

Greenland is about four-fifths ice sheet, so its people live along the ice-free coast, mostly in the south-west.

Which British overseas territory had only 35 permanent residents in 2023, the fewest of any territory in the world?

Pitcairn Islands' people descend from the Bounty mutineers and their Tahitian companions, who reached the empty island in 1790, went ashore and burned the ship.

Which Pacific nation of about 10,000 people signed a 2023 treaty giving its citizens a migration route abroad as seas rise?

Tuvalu's treaty offers only 280 places a year, and when the first ballot opened in 2025 the registrations covered more than half the country's population.

Which inland municipality, roughly the size of Austria, is counted as the world's largest city proper by population?

Chongqing's 32 million residents are spread over a municipality the size of a country, and roughly a third of them live in the countryside rather than in any city.

Which city on the Buriganga River is widely considered the most densely populated built-up urban area in the world?

Dhaka keeps swelling as migrants pour in from the countryside, among them climate refugees who lost homes and farmland to floods and river erosion.

Which Brazilian state capital is the most populous city in both the Western and Southern Hemispheres?

São Paulo began as a Jesuit mission founded on the feast of Saint Paul's conversion in 1554, and stayed in Rio's shadow until coffee made it rich in the late 19th century.

Which capital, first documented in 1147, is the most populous city lying entirely within Europe?

Moscow takes the title because Istanbul, which is bigger, straddles the Bosphorus and lies partly in Asia.

Which capital anchors the largest urban agglomeration in the Arab world, with about 20 million people?

Cairo is so congested that the government is building a new administrative capital in the desert 45 kilometres to the east to take the pressure off.

Which new capital in East Kalimantan is being built to relieve Jakarta of overpopulation and land sinking?

Nusantara hosted its first independence-day ceremony in August 2024, but the guest list was cut from 8,000 to 1,300 and its planned inauguration as capital that day was put off.

Which Hong Kong enclave, demolished in the 1990s, crammed about 33,000 people into 2.6 hectares?

Kowloon Walled City was an old fort that fell outside the colony's effective control and went largely ungoverned, so it grew unchecked until it was razed for a park.

Which English cleric's 1798 Essay on the Principle of Population argued that better food supply only breeds more people?

Thomas Malthus's bleak picture of people outrunning their food was read by both Charles Darwin and Alfred Russel Wallace, and it helped shape the theory of natural selection.

Which Stanford professor co-wrote the 1968 book The Population Bomb, predicting worldwide famines from overpopulation?

Paul Ehrlich later bet the economist Julian Simon that five metals would grow scarcer and dearer by 1990, and lost when all five fell in price.

Which generation, its name popularised by the writer Douglas Coupland, followed the baby boomers from 1965?

Generation X was at first known as the 'baby busters', because its members were born as birth rates slumped after the post-war boom.

What nickname was given to the indulged only children raised under the one-child policy introduced around 1980?

Little emperors grew up in what is called the four-two-one family: four grandparents and two parents all doting on a single child.

Census Day, the reference date for every United States census since 1930, falls on which annual occasion?

April Fools' Day took over after a one-off experiment: the 1920 count was moved to New Year's Day at the Agriculture Department's request, while harvests were fresh in farmers' minds, and was never held in winter again.

Which future president directed the first United States census in 1790?

Thomas Jefferson oversaw the count as Secretary of State, with US marshals doing the legwork, and both he and President Washington thought the total of 3.9 million too low.

Which state overtook New York in 2014 to become the third most populous in the United States?

Florida ranked only 20th among the states in 1950, with fewer than three million people, but by 2014 it was gaining about 800 residents a day.

Which part of the United Kingdom held its census a year late, in 2022, because of the pandemic?

Scotland's delay was the first postponement of a British census since 1941, and when the count was finally held its return rate fell short of expectations.

Which 1086 survey of England did William the Conqueror order so that he could properly tax the land he had conquered?

Domesday Book earned its name, a 12th-century royal treasurer wrote, because its rulings were as final as the Last Judgment and could not be appealed.

Which kingdom, then ruling Finland too, set up the Tabellverket in 1749 to compile its population statistics?

Sweden's parishes had been ordered in 1686 to keep records of everyone in them, so the new 'office for tabulation' had the raw data waiting for it.

Which Middle Eastern country has held no official census since 1932, wary of upsetting its sectarian balance?

Lebanon shares out political power among its religious groups by ratios rooted in the 1932 count, so a fresh tally could upset the whole arrangement.

Which dynasty's census of AD 2, registering 57.7 million people, is one of the world's earliest preserved censuses?

Han officials registered about 57.7 million people in some 12 million households, but only taxable families were counted, so the true population was larger.

Which country, with well over 100 million people, is the most populous landlocked nation in the world?

Ethiopia had a Red Sea coastline until 1993, when Eritrea voted for independence and took the whole of it.

Which country of more than 100 million people is the most populous in the Middle East?

Egypt's people are squeezed into the Nile valley and delta: almost all of them live on a few per cent of the land, because the rest is desert.

Which country, the world's most populous Muslim-majority nation, is the fourth most populous country overall?

Indonesia's people are so concentrated around Jakarta that the government is building a new capital on another island.

Which country has had more deaths than births almost every year since 1993, yet kept growing into the 2010s?

Italy's births beat its deaths only twice in that stretch, in 2004 and 2006, and arrivals from abroad kept the total rising all the same.

Which Balkan EU member's population has fallen from about 9 million in 1989 to 6.5 million, as young workers left?

Bulgaria's borders opened in 1989 after half a century of communist rule, and emigration on top of a low birth rate has drained the population ever since.

Which South Asian country is the fifth most populous in the world and has the second-largest Muslim population?

Pakistan has multiplied more than sevenfold since its first census in 1951 counted 33.7 million people, as birth rates stayed high while death rates fell.

Which country has two-thirds of its people in eight capital cities, mostly on its eastern and southern seaboards?

Australia averages only about 3.4 people per square kilometre, one of the sparsest figures on Earth, because so few live in its vast dry interior.

Which computing giant grew from the firm Herman Hollerith founded after his punched cards tallied the 1890 US census?

IBM took its name in 1924, after Hollerith's Tabulating Machine Company merged with several other firms. The Census Office leased his machines for the 1890 count, which finished months ahead of schedule.

Which island, home to more than 150 million people, is the most populous on Earth?

Java packs more than half of its country's people onto about 7% of the national land area. That works out at well over 1,000 residents for every square kilometre.

Which 1973 Charlton Heston film imagines a hungry, overpopulated New York City of 40 million people?

Soylent Green was loosely based on a 1966 Harry Harrison novel that set its overcrowded future in 1999. On screen, the crowded city has run short of food, water and housing.

Which European island had more people in 1841 than it has today, after famine and mass emigration?

Ireland counted 8.2 million people at the 1841 census, yet the whole island holds only just over 7 million today. It still ranks as Europe's second most populous island, behind Great Britain.

Which New World crop do historians credit with a quarter of Old World population growth between 1700 and 1900?

Potato farming began near Lake Titicaca in the Andes thousands of years ago. After the tuber crossed the Atlantic, it also drove about a quarter of the growth of Old World towns.

Which ungoverned Hong Kong enclave, demolished in the 1990s, squeezed about 33,000 people onto 2.6 hectares?

Kowloon Walled City reached roughly 1.2 million people per square kilometre, with almost no sunlight on its lower floors. A park opened on the cleared site in 1995.

Which book of the Hebrew Bible takes its English name from two censuses of the Israelites in the wilderness?

Numbers translates Arithmoi, the title the book carries in the Greek Septuagint. The tribe of Levi was left out of the count because its men were exempt from military service.

Which English astronomer built a pioneering life table from Breslau's mortality records, used to price annuities?

Edmond Halley, far better known for the comet that bears his name, published the table in 1693. It showed how many people survived to each age, so an annuity could be priced by the buyer's age.

Which city of more than 15 million people straddles the Bosphorus, with residents living on two continents?

Istanbul keeps about two-thirds of its people on the European shore and the rest in Asia. Migration from Anatolia quickened after the first bridge across the strait opened in 1973.

Which capital was the largest city in the world from about 1831 until 1925?

London grew so crowded that cholera epidemics killed 14,000 of its people in 1848 and 6,000 more in 1866. Greater London went on to reach a pre-war high of 8.6 million in 1939.

Which country, where citizenship comes with a job rather than by birth, is the only one with under 1,000 residents?

Vatican City had 882 residents in 2024, all living on 44 hectares. Citizenship is granted on appointment to serve the Holy See, and extends to a spouse and children only while they live there.

Which microstate, the second smallest country in the world by area, is also the most densely populated?

Monaco fits about 38,400 people into roughly two square kilometres of Mediterranean coast. Only one state on Earth covers less ground.

Which landlocked country of about 3.5 million people is the world's most sparsely populated sovereign state?

Mongolia houses roughly half of its people in one city, Ulaanbaatar, which is also the coldest national capital in the world.

Which state of India, the world's most populous country since 2023, alone holds more than 240 million people?

Uttar Pradesh already counted 199.6 million people at the 2011 census. Most of the state lies on the intensely farmed plain of the Ganges and its tributary the Yamuna.

Which metropolis, sitting more than 2,200 metres above sea level, is the most populous in North America?

Mexico City proper counted 9.2 million people at the 2020 census, on a high plateau ringed by volcanoes that rise above 5,000 metres.

Which capital on the Congo River has grown into the largest French-speaking urban area in the world?

Kinshasa was called Léopoldville until 1966. French runs its government, schools and media, while Lingala is the common language of the street.

Which vast region covers about three-quarters of Russia's land but is home to only about a quarter of its people?

Siberia spreads its residents over 13.1 million square kilometres. More than 85% of them are of European descent, a legacy of conquest and settlement that began in 1582.

Which Gulf state has the most male-skewed population in the world, with men outnumbering women by more than two to one?

Qatar draws most of its residents from abroad. Foreign workers, most of them men, make up roughly 88% of the population.

Which EU member state counts almost half of its residents as foreign nationals, the largest group being Portuguese?

Luxembourg counted about 682,000 residents in 2025, 47% of them foreign nationals. The Portuguese made up 13.2% of the population, well ahead of the French at 7.2%.

Which model describes the historical shift from high birth and death rates to low ones as societies develop?

Demographic transition brings a boom midway. Death rates drop first, thanks to better food supply and sanitation, and birth rates follow only later.

Which chart shows a country's age groups as horizontal bars, with males on the left and females on the right?

Population pyramid charts earn the name when a country is growing. A broad base then shows a high share of children and a high fertility rate.

Which statistic compares the under-15s and over-64s in a population with the working-age adults who support them?

Dependency ratio falls when a country has more working-age adults for every child and pensioner, which eases the load on those in work.

In migration studies, what name is given to war, famine or unemployment that drives people to leave home?

Push factor is the label for conditions in the country of origin. Attractions in the country of destination, such as jobs, are called pull factors.

Which phrase was coined for the flow of scientists and technologists from post-war Europe to North America?

Brain drain names the sending country's loss. The matching benefit to the country that receives the skilled migrants is sometimes called a brain gain.

Which word, from the Greek for dispersion, describes a people living scattered outside their homeland?

Diaspora was first used in this sense for the Jewish exile that followed the Babylonian captivity. It now covers groups from Armenians to Venezuelans.

Physiological density, unlike ordinary population density, divides a country's people by the area of what?

Arable land is the divisor, so a desert country whose people crowd one fertile valley scores far higher than its ordinary density suggests.

Which term describes a country's leading urban centre when it is at least twice as large as the next biggest?

Primate city was the geographer Mark Jefferson's label, coined in 1939. He added that such a place is also more than twice as significant as its nearest rival.

Which title is given to a census worker who goes door to door to count the people in each household?

Enumerator visits are only one way to run the count. The United Nations asks that every person be recorded individually, at the same moment, at least once every ten years.

Which measure of human health has more than doubled worldwide since 1900, rising from 32 years to more than 70?

Life expectancy climbed largely because far fewer children now die young, although the risk of dying has fallen at every age.

Which physician and TED Talk star co-founded the Gapminder Foundation and co-wrote the bestselling book Factfulness?

Hans Rosling used Gapminder's Trendalyzer software to turn decades of development statistics into moving charts. Factfulness was published after his death in 2017.

Which agronomist won a Nobel Peace Prize for high-yield wheat credited with saving a billion people from starvation?

Norman Borlaug bred semi-dwarf, disease-resistant wheat varieties. Where farmers in South Asia adopted them, wheat yields nearly doubled between 1965 and 1970.

Which American founding father predicted in a 1751 essay that the colonies' population would double every 25 years?

Benjamin Franklin argued that Europe was too crowded and America's land underused, so that within a century most Englishmen would live on the western side of the Atlantic.

Which Frenchwoman from Arles holds the record for the longest verified human lifespan, at 122 years?

Jeanne Calment was born in 1875 and died in 1997. She had already been declared the oldest person in history with a verified date of birth when she turned 120.

In the Gospel of Luke, a census ordered by which Roman emperor sends Joseph and Mary to Bethlehem?

Augustus did set provincial taxes by census. The count that Luke names, though, was held in AD 6, when Quirinius governed Syria and registered Judaea for tax purposes.

Which empire, lacking a written script, kept its census records on knotted cords called quipus?

Inca record keepers tied the knots in a base-10 positional system, on cords of cotton or of llama and alpaca hair.

Which seventeenth-century haberdasher is regarded as the founder of demography for his study of the Bills of Mortality?

John Graunt presented fifty copies of his findings to the Royal Society, which elected him a fellow with the endorsement of King Charles II.

Which economist bet The Population Bomb's author in 1980 that five commodity prices would fall, and won a decade later?

Julian Simon let his rival choose any raw materials and any date more than a year away. All five picks had fallen in price when the wager ended in 1990.

Which Nobel-winning economist calculated in 1990 that over 100 million women were missing from the world's population?

Amartya Sen made the case in an essay for The New York Review of Books. He took the proportion of women to men in some countries as a baseline, then counted the shortfall elsewhere.

Which German-born geographer's laws of migration, from the 1880s, noted that most migrants move only a short distance?

Ernst Ravenstein, born in Frankfurt to a family of cartographers, also argued that migration is often gradual and happens step by step.

Which industrial process for making ammonia fertiliser has been called the detonator of the population explosion?

Haber–Bosch plants made nitrogen fertiliser plentiful, which let world population climb from 1.6 billion in 1900 to 7.7 billion by 2018.

Which 1918 pandemic infected nearly a third of the world's population and killed tens of millions?

Spanish flu got its name because newspapers in neutral Spain reported the outbreak freely, while wartime censors in the fighting countries suppressed the bad news.

Which 1972 report for the Club of Rome used the World3 computer model to simulate humanity's future on a finite planet?

The Limits to Growth has sold some 30 million copies in 30 languages. Its simulations set exponential growth in people and industry against a fixed supply of resources.

In 2018, people aged 65 and over outnumbered which age group worldwide for the first time in history?

Children under five were overtaken as the world aged. The United Nations expects one person in six to be over 65 by 2050, up from one in eleven in 2019.

Which Mediterranean country has published no national census since 1932, when it was under a French mandate?

Lebanon divided its positions of power among religious groups on the basis of that 1932 count, under the National Pact struck at independence in 1943.

Which Nordic country's census of 1703, recording every resident by name, is the oldest complete one to survive?

Iceland's count also noted the age, home and social standing of every person. UNESCO added it to the Memory of the World register in 2013.

Which city next to Hong Kong grew from about 30,000 people in 1980 into a metropolis of more than 17 million?

Shenzhen was picked as one of the first special economic zones because of that location, which drew foreign investment and migrants looking for work.

Which term, taken from ancient Greek, do geographers use for the inhabited part of the world?

Ecumene comes from a Greek verb meaning to inhabit. To the geographers of antiquity it covered the three continents they knew.

Which communal Anabaptist group of the North American prairies averaged around ten children per family in 1954?

Hutterites have since halved that figure to around five children per family, though their fertility remains high next to the North American average.

John Brunner's Hugo-winning 1968 novel about overpopulation imagines all of humanity standing on which island?

Zanzibar replaced the Isle of Wight, which an older version of the same thought experiment had used, because the world had grown too crowded to fit there.

Which immigration station in New York Harbor processed about 12 million arrivals between 1892 and 1954?

Ellis Island handled so many newcomers that, by one estimate, two-fifths of Americans may be descended from people who passed through it.