Data / Population / Waterbury, CT

Population in Waterbury, CT

Population in Waterbury, CT was 115,771 in 2025, according to the U.S. Census Bureau. That is up 0.2% from 2024. That is the 5th highest of 21 cities in 2025.

Compared with Connecticut and United States

Rankings

• Countries by population 215 places
• EU countries by population 27 places
• US states by population 51 places
• US cities by population 3223 places

Definition

Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). Norway: Statistics Norway, 1 January. United States: Census Bureau population estimates for 1 July. United Kingdom regions and local authorities: Office for National Statistics estimates for 30 June. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.

The World Bank series exists for every country, so use it (through compare) to rank countries on one basis.

How to cite

U.S. Census Bureau. Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-12.

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Population elsewhere in Connecticut

• Stamford, CT
• Bridgeport, CT
• Hartford, CT
• New Haven, CT

All statistics for Waterbury, CT