Eight Billion, Unevenly
There are 8.2 billion of us, and we are not spread out. We are piled into a handful of river valleys, coastal plains and monsoon deltas — and most of the planet's land surface holds almost nobody at all. Here is the map of where humanity actually sits.
Half of humanity fits in one circle
Draw a 4,000-kilometre circle centred on Yunnan and it swallows China, India, Japan, Indonesia, Bangladesh, Pakistan, Vietnam, the Philippines and Korea. Everyone else — all of Africa, Europe, the Americas, the Middle East, Oceania — lives outside it.
The circle idea began as a Reddit map by Ken Myers in 2013; Danny Quah shrank it to 3,300 km in 2015, and Alasdair Rae re-solved it in 2022 across ~1,500 candidate circles.
From two people per square kilometre to twenty thousand
National population density spans four orders of magnitude. On a logarithmic strip, the whole inhabited world fits between Mongolia's empty steppe and the stacked apartment towers of Macau — a 10,000-fold difference.
Almost everyone lives in a narrow northern belt
Humanity is not just clustered east–west. It is squeezed into a temperate and sub-tropical band north of the equator. Half of everyone alive lives north of about 27°N — the latitude of Delhi, Cairo and the Florida Keys.
Cities won; the countryside emptied
The UN's 2025 revision splits the world three ways — cities, towns and rural areas. In 1950 towns and countryside each held 40% of humanity and cities just 20%. In seventy-five years the rural share collapsed by more than half.
Ten countries hold 57% of everyone
There are around 195 countries. Ten of them contain more people than the other 185 combined — and two of those ten hold more than a third of the human race between them.
The map is about to be redrawn
The next three billion people will not arrive where the last three did. Growth has moved to sub-Saharan Africa and to cities — and the ground we build on is expanding faster than we are.
A crowded map is a fragile one
Risk is concentratedThe same clustering that makes cities productive stacks people onto floodplains, deltas and fault lines. Four in ten of us live within 100 km of a rising sea. A single bad monsoon or a single earthquake in the wrong valley reaches more people than ever before.
Emptiness is a resourceNinety percent of the land holds five percent of the people. That space is where food, water, carbon and biodiversity come from. How much of it we convert to built surface in the next twenty-five years is a live choice, not a forecast.
Read a map before a number"Eight billion" is an abstraction. "Half of us inside one circle" is a fact you can point at. When you next see a global average — of income, emissions, water use — ask which part of the map it actually describes.
Sources & notes
- UN DESA, World Population Prospects 2024. World population 8.2 bn (2024–25); country estimates for 2025; projected peak of ~10.3 bn in the mid-2080s; regional projections to 2100.
- UN DESA, World Urbanization Prospects 2025 (published Nov 2025). 45% of people in cities (3.69 bn), 36% in towns, 19% rural; 1950 shares of 20% / 40% / 40%; 33 megacities in 2025 vs 8 in 1975; ~12,000 cities today and 15,000+ by 2050; 982 m new city dwellers by 2050; ~3,000 cities shrinking 2015–25; built-up land per person 44 m² (1975) → 63 m² (2025).
- Alasdair Rae, "The Yuxi Circle," Stats, Maps n Pix (2022). 4.32 bn people — 55% of the world — inside a 4,000 km circle centred on Yuxi, Yunnan, chosen from ~1,500 candidate circles using UN population data.
- Ken Myers (2013) and Danny Quah (2015). The original "Valeriepieris circle" and its 3,300 km refinement centred on Mong Khet, Myanmar; the 4,000 km circle covers roughly 10% of Earth's surface.
- Max Galka, "Half the World Lives on 1% of Its Land," via Bloomberg (2016), using NASA SEDAC Gridded Population of the World.
- Small & Cohen, reported by the American Geophysical Union / ScienceDaily (2008). Roughly 95% of the world's population occupies about 10% of the land.
- Kummu & Varis, "The world by latitudes," Applied Geography 31 (2011). ~50% of the world's population between 20°N and 40°N; 87.5% in the Northern Hemisphere.
- Bill Rankin, Radical Cartography (2008). Population by latitude; the population median latitude falls near 27°N.
- UN Atlas of the Oceans. About 40% of the world's population lives within 100 km of a coast.
- World Bank / UN national population density, 2023–24 estimates. Mongolia ≈2, Australia ≈3, Russia ≈9, USA ≈37, China ≈151, Japan ≈331, India ≈481, Bangladesh ≈1,350, Singapore ≈8,200, Macau ≈20,800 people per km².
- Derived figures, flagged: the 4.64 bn / 57% top-ten total is our sum of the ten UN country estimates; the 4.67 bn urban figure for 2050 is 3.69 bn + 982 m; the ~61 people/km² world average is 8.2 bn divided by ice-free land area. All are arithmetic on published UN figures, not separately published values.
- The map is schematic. Continent outlines are hand-simplified on an equirectangular grid and the circle is drawn as an approximating ellipse; use it to read relationships, not distances.