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Waterbury population

Waterbury, Connecticut had an estimated 115,771 residents on July 1, 2025, the 277th-largest city in the US. That is up 4.9% since the 2010 Census and up 8% since 2000.

WaterburyConnecticutPop. 115,771
Population, July 2025
115,771+1.2% since April 2020
People per sq mile
4,05428.6 sq mi of land
Median age
37.815.3% are 65 or older
Households with kids
34.1%with anyone under 18

Population by year, 2000 to 2025

90k96k103k109k116k2000: 107,19520002001: 107,7322002: 108,21220022003: 108,9272004: 109,08320042005: 109,2482006: 109,45720062007: 109,7212008: 109,93820082009: 110,1742010: 110,36620102011: 110,0792012: 110,03220122013: 109,7522014: 109,54920142015: 109,0262016: 108,47620162017: 108,2812018: 108,10520182019: 107,4382020: 114,45220202021: 114,5732022: 114,71620222023: 115,1862024: 115,50120242025: 115,7712025
Darker bars are the April 2000, 2010 and 2020 benchmarks; the rest are July 1 estimates. Source: US Census Bureau population estimates (intercensal 2000-2010, Vintage 2020 and Vintage 2025).
YearPopulationChangeBasis
2025115,771+270Estimate, July 1
2024115,501+315Estimate, July 1
2023115,186+470Estimate, July 1
2022114,716+143Estimate, July 1
2021114,573+121Estimate, July 1
2020114,452+7,014April 2020 estimates base
2019107,438-667Estimate, July 1
2018108,105-176Estimate, July 1
2017108,281-195Estimate, July 1
2016108,476-550Estimate, July 1
2015109,026-523Estimate, July 1
2014109,549-203Estimate, July 1
2013109,752-280Estimate, July 1
2012110,032-47Estimate, July 1
2011110,079-287Estimate, July 1
2010110,366+1922010 Census (April 1)
2009110,174+236Estimate, July 1
2008109,938+217Estimate, July 1
2007109,721+264Estimate, July 1
2006109,457+209Estimate, July 1
2005109,248+165Estimate, July 1
2004109,083+156Estimate, July 1
2003108,927+715Estimate, July 1
2002108,212+480Estimate, July 1
2001107,732+537Estimate, July 1
2000107,195April 2000 estimates base

Year-to-year changes across 2010 and 2020 mix census counts with estimates, so small jumps at those years are partly method changes.

Frequently asked questions

What is the population of Waterbury in 2025?

The Census Bureau estimates Waterbury had 115,771 residents on July 1, 2025, making it the 277th-largest city in the US.

Is Waterbury growing?

Yes. Waterbury has grown 4.9% since the 2010 Census (110,366 people), and grown 1.2% since 2020.

What was the population of Waterbury in 2000?

About 107,195 (the Census Bureau's April 2000 estimates base). By the 2010 Census it was 110,366.

How dense is Waterbury?

Waterbury has about 4,054 people per square mile of land (28.6 square miles).

More about Waterbury

See cost of living, jobs and commutes in Waterbury, Waterbury weather by month, or every Waterbury ZIP code. For the biggest cities in the country, see the largest US cities.