SortStack #138 — 2026-10-25

By population · Order from fewest to most people.

1. The population of Nauru 12.5K

   The world's smallest island nation was once, briefly, the richest country per capita on Earth.

2. Tenochtitlan, the Aztec capital, when the Spanish arrived 200K

   Built on a lake and bigger than almost every European city of its day.

3. Paris — the city proper, inside the ring road 2.1M

   Smaller than Houston; the greater metro area holds five times as many people.

4. The population of Norway 5.5M

   Its sovereign wealth fund owns about 1.5 percent of every listed company on Earth.

5. Greater Cairo, Egypt's capital region 22M

   Africa's largest metro area sits beside pyramids that were already ancient to Cleopatra.

6. Greater Tokyo, the world's largest metro area 37M

   More people than all of Canada, in an area you can cross by train in two hours.

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