Data / Rankings / Population / Cities in Connecticut

Cities in Connecticut by population

Bridgeport, CT had the highest population of 21 cities in 2020, at 147,672. Groton, CT had the lowest, at 9,365. The median was 55,508 and the figure for Connecticut was 3.58 million. Source: the U.S. Census Bureau.

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Highest147,672Bridgeport, CT
Lowest9,365Groton, CT
Median55,50821 cities
Connecticut3,579,643History

All cities, 2020

Bridgeport, CT: 147,672 personsBridgeport, CT147,672Stamford, CT: 135,447 personsStamford, CT135,447New Haven, CT: 129,319 personsNew Haven, CT129,319Hartford, CT: 120,479 personsHartford, CT120,479Waterbury, CT: 113,875 personsWaterbury, CT113,875Norwalk, CT: 90,926 personsNorwalk, CT90,926Danbury, CT: 86,078 personsDanbury, CT86,078New Britain, CT: 72,941 personsNew Britain, CT72,941Bristol, CT: 60,744 personsBristol, CT60,744Meriden, CT: 60,616 personsMeriden, CT60,616West Haven, CT: 55,508 personsWest Haven, CT55,508Milford, CT: 50,411 personsMilford, CT50,411Middletown, CT: 46,955 personsMiddletown, CT46,955Shelton, CT: 40,730 personsShelton, CT40,730Norwich, CT: 40,035 personsNorwich, CT40,035Torrington, CT: 35,361 personsTorrington, CT35,361Naugatuck, CT: 31,496 personsNaugatuck, CT31,496New London, CT: 26,793 personsNew London, CT26,793Ansonia, CT: 18,894 personsAnsonia, CT18,894Derby, CT: 12,311 personsDerby, CT12,311Groton, CT: 9,365 personsGroton, CT9,365Bridgeport, CT: 147,672 personsBridgeport, CT147,672Stamford, CT: 135,447 personsStamford, CT135,447New Haven, CT: 129,319 personsNew Haven, CT129,319Hartford, CT: 120,479 personsHartford, CT120,479Waterbury, CT: 113,875 personsWaterbury, CT113,875Norwalk, CT: 90,926 personsNorwalk, CT90,926Danbury, CT: 86,078 personsDanbury, CT86,078New Britain, CT: 72,941 personsNew Britain, CT72,941Bristol, CT: 60,744 personsBristol, CT60,744Meriden, CT: 60,616 personsMeriden, CT60,616West Haven, CT: 55,508 personsWest Haven, CT55,508Milford, CT: 50,411 personsMilford, CT50,411Middletown, CT: 46,955 personsMiddletown, CT46,955Shelton, CT: 40,730 personsShelton, CT40,730Norwich, CT: 40,035 personsNorwich, CT40,035Torrington, CT: 35,361 personsTorrington, CT35,361Naugatuck, CT: 31,496 personsNaugatuck, CT31,496New London, CT: 26,793 personsNew London, CT26,793Ansonia, CT: 18,894 personsAnsonia, CT18,894Derby, CT: 12,311 personsDerby, CT12,311Groton, CT: 9,365 personsGroton, CT9,365
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

RankCities2020
persons
1Bridgeport, CT147,672
2Stamford, CT135,447
3New Haven, CT129,319
4Hartford, CT120,479
5Waterbury, CT113,875
6Norwalk, CT90,926
7Danbury, CT86,078
8New Britain, CT72,941
9Bristol, CT60,744
10Meriden, CT60,616
11West Haven, CT55,508
12Milford, CT50,411
13Middletown, CT46,955
14Shelton, CT40,730
15Norwich, CT40,035
16Torrington, CT35,361
17Naugatuck, CT31,496
18New London, CT26,793
19Ansonia, CT18,894
20Derby, CT12,311
21Groton, CT9,365

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, 2020) [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, 2020. 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=2020. 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, 2020. 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=2020.

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, 2020 [Dataset]. Available at: https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/, via Invokely: https://invokely.ai/rankings/population/connecticut-cities?period=2020 (Accessed: 12 October 2026).

BibTeX
@misc{census_cities_in_connecticut_by_2020,
  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, 2020}},
  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=2020. 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, 2020
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=2020
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population/connecticut-cities?period=2020.
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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Rank Cities in Connecticut by population using official data, and cite the source.
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Questions

Which city has the highest population?

Bridgeport, CT, with 147,672 in 2020, according to the U.S. Census Bureau.

Which city has the lowest population?

Groton, CT, with 9,365 in 2020.

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