Data / Rankings / Population / Cities in Connecticut

Cities in Connecticut by population

Bridgeport, CT had the highest population of 21 cities in 2021, at 148,162. Groton, CT had the lowest, at 9,355. The median was 55,280 and the figure for Connecticut was 3.61 million. Source: the U.S. Census Bureau.

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Highest148,162Bridgeport, CT
Lowest9,355Groton, CT
Median55,28021 cities
Connecticut3,607,765History

All cities, 2021

Bridgeport, CT: 148,162 personsBridgeport, CT148,162Stamford, CT: 136,851 personsStamford, CT136,851New Haven, CT: 134,118 personsNew Haven, CT134,118Hartford, CT: 120,803 personsHartford, CT120,803Waterbury, CT: 114,573 personsWaterbury, CT114,573Norwalk, CT: 91,499 personsNorwalk, CT91,499Danbury, CT: 87,087 personsDanbury, CT87,087New Britain, CT: 73,567 personsNew Britain, CT73,567Bristol, CT: 61,129 personsBristol, CT61,129Meriden, CT: 60,451 personsMeriden, CT60,451West Haven, CT: 55,280 personsWest Haven, CT55,280Milford, CT: 50,444 personsMilford, CT50,444Middletown, CT: 48,062 personsMiddletown, CT48,062Shelton, CT: 41,587 personsShelton, CT41,587Norwich, CT: 40,065 personsNorwich, CT40,065Torrington, CT: 35,526 personsTorrington, CT35,526Naugatuck, CT: 31,635 personsNaugatuck, CT31,635New London, CT: 27,337 personsNew London, CT27,337Ansonia, CT: 18,937 personsAnsonia, CT18,937Derby, CT: 12,351 personsDerby, CT12,351Groton, CT: 9,355 personsGroton, CT9,355Bridgeport, CT: 148,162 personsBridgeport, CT148,162Stamford, CT: 136,851 personsStamford, CT136,851New Haven, CT: 134,118 personsNew Haven, CT134,118Hartford, CT: 120,803 personsHartford, CT120,803Waterbury, CT: 114,573 personsWaterbury, CT114,573Norwalk, CT: 91,499 personsNorwalk, CT91,499Danbury, CT: 87,087 personsDanbury, CT87,087New Britain, CT: 73,567 personsNew Britain, CT73,567Bristol, CT: 61,129 personsBristol, CT61,129Meriden, CT: 60,451 personsMeriden, CT60,451West Haven, CT: 55,280 personsWest Haven, CT55,280Milford, CT: 50,444 personsMilford, CT50,444Middletown, CT: 48,062 personsMiddletown, CT48,062Shelton, CT: 41,587 personsShelton, CT41,587Norwich, CT: 40,065 personsNorwich, CT40,065Torrington, CT: 35,526 personsTorrington, CT35,526Naugatuck, CT: 31,635 personsNaugatuck, CT31,635New London, CT: 27,337 personsNew London, CT27,337Ansonia, CT: 18,937 personsAnsonia, CT18,937Derby, CT: 12,351 personsDerby, CT12,351Groton, CT: 9,355 personsGroton, CT9,355
persons. Source: U.S. Census Bureau, Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals). Retrieved 2026-10-12.

Full ranking

RankCities2021
persons		Change on 2020
1Bridgeport, CT148,162+0.3%
2Stamford, CT136,851+1%
3New Haven, CT134,118+3.7%
4Hartford, CT120,803+0.3%
5Waterbury, CT114,573+0.6%
6Norwalk, CT91,499+0.6%
7Danbury, CT87,087+1.2%
8New Britain, CT73,567+0.9%
9Bristol, CT61,129+0.6%
10Meriden, CT60,451-0.3%
11West Haven, CT55,280-0.4%
12Milford, CT50,444+0.1%
13Middletown, CT48,062+2.4%
14Shelton, CT41,587+2.1%
15Norwich, CT40,065+0.1%
16Torrington, CT35,526+0.5%
17Naugatuck, CT31,635+0.4%
18New London, CT27,337+2%
19Ansonia, CT18,937+0.2%
20Derby, CT12,351+0.3%
21Groton, CT9,355-0.1%

Other periods

About this ranking

Resident population.

More on how it is measured
  • Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón).
  • Norway: Statistics Norway, 1 January.
  • Iceland and its municipalities: Statistics Iceland, 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.
  • UN World Population Prospects estimates for 1 July cover the years before 1960 and the areas the World Bank does not publish, such as Taiwan.

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

Every value in the ranking comes from the same publisher and the same period, so the cities are compared on one definition. Equal values share a rank.

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.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals) (Cities in Connecticut by population, 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/

MLA 9

Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals), Cities in Connecticut by population, 2021. U.S. Census Bureau, 14 May 2026, https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Invokely, https://invokely.ai/rankings/population/connecticut-cities?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals). Cities in Connecticut by population, 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Also distributed by Invokely, https://invokely.ai/rankings/population/connecticut-cities?period=2021.

Harvard

U.S. Census Bureau (2026) Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals), Cities in Connecticut by population, 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/, via Invokely: https://invokely.ai/rankings/population/connecticut-cities?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_cities_in_connecticut_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals): Cities in Connecticut by population, 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/population/connecticut-cities?period=2021. Publisher attribution: 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.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals): Cities in Connecticut by population, 2021
PY  - 2026
DA  - 2026/05/14
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/
L2  - https://invokely.ai/rankings/population/connecticut-cities?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population/connecticut-cities?period=2021.
N1  - Publisher attribution: 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.
ER  -
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Questions

Which city has the highest population?

Bridgeport, CT, with 148,162 in 2021, according to the U.S. Census Bureau.

Which city has the lowest population?

Groton, CT, with 9,355 in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals). Retrieved 2026-10-12.

Population: other rankings

Cities in Connecticut: more rankings