Ranking of Connecticut Counties By Population in 2015

Updated on January 28, 2024.

Based on the US Census Vintage data estimates, in 2015, the Population for Connecticut was 3.59M. Among all Connecticut counties, Fairfield County had the highest population (945.32K), followed by Hartford County (896.56K), and New Haven County (860.51K).

The chart below shows the top 8 counties, and the table below shows the ranking of all Connecticut counties.

You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.

See this for other years:
Ranking of Connecticut Counties By Population in 2015
Fairfield
Hartford
New Haven
New London
Litchfield
Middlesex
Tolland
Windham
Ranking of Connecticut Counties By Population in 2015
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Rank County Population
1 Fairfield County 945323
2 Hartford County 896563
3 New Haven County 860506
4 New London County 269818
5 Litchfield County 184171
6 Middlesex County 163809
7 Tolland County 151815
8 Windham County 116556