How Many Cities Exist on Earth? The Elusive Count

No Single Answer

There is no universally agreed number because "city" has no global legal definition. Criteria vary wildly: population thresholds (5,000? 50,000? 100,000?), administrative status, economic function, density, or historical charter.

Best Available Estimate

The United Nations (World Urbanization Prospects) estimated ~33,300 "urban agglomerations" with 300,000+ population in 2018. Of these, 473 exceeded 1 million; 33 were "megacities" (>10M).

Why Counts Diverge

• China: Defines cities administratively (prefecture-level) — often huge rural areas. Stats cite 600+ "cities" but only ~100 true urban cores.
• India: Census towns (statutory + census) = ~4,000+; but "urban agglomerations" ~475.
• US: 19,500+ "incorporated places" — most are tiny towns.
• EU: "Functional Urban Areas" (commuting zones) — different from admin boundaries.

Practical Takeaway

For global comparisons, use UN urban agglomeration data (consistent methodology). For national policy, use national statistical office definitions. The "number of cities" is a policy choice, not a fact.