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Fullerton, California: population and official figures

Population (1 July)
138,675
2025

In depth

What is the population of Fullerton, California?

Fullerton, California, had an estimated 138,675 residents on 1 July 2025, the 207th largest of the 824 US cities and towns with 50,000 or more people, and the 42nd largest of 483 incorporated places in California (Census Bureau Vintage 2025 estimates).

Source: U.S. Census Bureau · saved copy

Is the population of Fullerton growing?

Its population is down 5,045 (3.5%) on the April 2020 estimates base of 143,720, 56th slowest-growing of 824 US cities of 50,000 or more.

Source: U.S. Census Bureau · saved copy

How fast is Fullerton, California growing?

In the year to 1 July 2025 its population fell by 937 (0.67%), from 139,612 in July 2024.

Source: U.S. Census Bureau · saved copy

When does the fiscal year of Fullerton end?

The Census Bureau lists Fullerton's government in its 2022 finance survey as "Fullerton City", with a fiscal year that ends on 30 June.

Source: U.S. Census Bureau · saved copy

More figures

Who runs Fullerton?

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

Fullerton is in California, which has 39,355,309 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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