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© 2026 STATLAS. Data under CC BY 4.0 from World Bank, GeoNames, Open-Meteo & others.

Indices labeled “modeled” are computed estimates — see methodology.

CitiesMercer IslandPopulation

Population in Mercer Island

United States · Mercer Island profile

Population

25,042

people

World rank

#22473

of 33750

Percentile

33%

higher is better

Data quality

Measured

Total resident population.

Source: GeoNames · source data.

See full ranking About this metric Mercer Island profile

FAQ

Frequently asked

What is the population in Mercer Island?

Mercer Island has a population of 25,042 people. Total resident population.

How does Mercer Island rank for population?

Mercer Island ranks #22473 of 33750 cities for population (higher is better).