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Naperville, Illinois: population and official figures

Population (1 July)
153,114
2025

In depth

What is the population of Naperville, Illinois?

Naperville, Illinois, had an estimated 153,114 residents on 1 July 2025, the 178th largest of the 824 US cities and towns with 50,000 or more people, and the 3rd largest of 1294 incorporated places in Illinois (Census Bureau Vintage 2025 estimates).

Source: U.S. Census Bureau · saved copy

Is the population of Naperville growing?

Its population is up 3,579 (2.4%) on the April 2020 estimates base of 149,535, 361st fastest-growing of 824 US cities of 50,000 or more.

Source: U.S. Census Bureau · saved copy

How fast is Naperville, Illinois growing?

In the year to 1 July 2025 its population rose by 566 (0.37%), from 152,548 in July 2024.

Source: U.S. Census Bureau · saved copy

When does the fiscal year of Naperville end?

The Census Bureau lists Naperville's government in its 2024 finance survey as "Naperville City", with a fiscal year that ends on 30 April.

Source: U.S. Census Bureau · saved copy

More figures

Who runs Naperville?

In the United States, cities and towns are run by municipalities: Elected council; mayor elected directly or chosen by the council; in council-manager systems the council hires a professional city manager. Police, fire, local roads, zoning, water, parks. Townships exist in fewer than half the states.

How local power works in the United States

Naperville is in Illinois, which has 12,719,141 residents.

Cities of a similar size in the United States

Up a level: all cities in the United States · the United States · government and power

Sources

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