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Waltham, Massachusetts: population and official figures

Population (1 July)
65,037
2025

In depth

What is the population of Waltham, Massachusetts?

Waltham, Massachusetts, had an estimated 65,037 residents on 1 July 2025, the 614th largest of the 824 US cities and towns with 50,000 or more people, and the 17th largest of 58 incorporated places in Massachusetts (Census Bureau Vintage 2025 estimates).

Source: U.S. Census Bureau · saved copy

Is the population of Waltham growing?

Its population is down 166 (0.3%) on the April 2020 estimates base of 65,203, 255th slowest-growing of 824 US cities of 50,000 or more.

Source: U.S. Census Bureau · saved copy

How fast is Waltham, Massachusetts growing?

In the year to 1 July 2025 its population fell by 141 (0.22%), from 65,178 in July 2024.

Source: U.S. Census Bureau · saved copy

When does the fiscal year of Waltham end?

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

Source: U.S. Census Bureau · saved copy

More figures

Who runs Waltham?

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

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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