SortStack #12 — 2026-06-21

By population · Order from fewest to most people.

1. Sitting United States senators 100

   Two per state since 1789 — the chamber only grows when a new state joins the union.

2. The population of Vatican City 760

   Many of its citizens don't live inside the walls — they're diplomats posted abroad.

3. Residents of Tokelau, in the South Pacific 1.5K

   The first nation to run on 100 percent solar power, and it has no airport at all.

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

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

5. Berlin — the city proper 3.7M

   Has more bridges than Venice and more museums than rainy days per year.

6. The population of Singapore 5.9M

   A city-state smaller than New York City, yet one of the world's busiest ports.

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