Ranking of Connecticut Counties By Total Voting-age Population (18yrs and over) from Census 2020

Updated on August 22, 2023.

According to the data from the US 2020 Census, as at April 2020, among all the counties in Connecticut, Fairfield County had the highest voting-age population (18 years and over) (743.17K), followed by Hartford County (713.43K), and New Haven County (690.99K).

The chart below shows the top 8 counties with high voting-age population, and the table below shows the ranking of all Connecticut counties based on voting-age population.

You can also see the ranking of counties by population for other states as well as for the whole United States.

Ranking of Connecticut Counties By Total Voting-age Population from Census 2020
Fairfield
743.17K
Hartford
713.43K
New Haven
690.99K
New London
216.92K
Litchfield
151.88K
Middlesex
135.98K
Tolland
123.58K
Windham
93.27K
Ranking of Connecticut Counties By Total Voting-age Population from Census 2020
Rank
County
Voting-age Population
1 Fairfield County 743,170
2 Hartford County 713,425
3 New Haven County 690,994
4 New London County 216,922
5 Litchfield County 151,879
6 Middlesex County 135,983
7 Tolland County 123,584
8 Windham County 93,270
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