SortStack #33 — 2026-07-12

By population · Order from fewest to most people.

1. Athletes who competed at the Paris 2024 Olympics 10.5K

   The first Games with full gender parity: exactly half the quota places went to women.

2. The population of Reykjavík 140K

   The world's northernmost capital heats its streets and pavements with volcanic geothermal water.

3. The population of Iceland 390K

   So small that a dating app warns Icelanders if a match is actually their cousin.

4. Ancient Rome at the height of the empire 1M

   No European city reached a million residents again until London, around 1800.

5. 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.

6. The population of Bangladesh 173M

   More people than Russia, in an area smaller than the US state of Iowa.

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