Connecticut Population By County in 2018
Updated on January 29, 2024.
According to the US Census Bureau population estimates, there were 3,574,561 people living in Connecticut in 2018. Fairfield County was the most populated county with 945,511 residents, followed by Hartford County with 892,767 residents, and New Haven County with 856,895 residents. Windham County with a population of 117,182 was the least populated county in Connecticut in 2018.
Use the map below to interactively explore the population for each county in Connecticut in 2018. The data can also be explored further by sorting and filtering with the table below.
You can see similar information for other states and by state for the United States.
Related Topics: Connecticut Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage).
See this for other years:
Connecticut Population By County (2018)
Table of Connecticut Population By County in 2018
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| County | Population | % of State Population |
|---|---|---|
| Fairfield | 945,511 | 26.45% |
| Hartford | 892,767 | 24.98% |
| Litchfield | 181,151 | 5.07% |
| Middlesex | 163,053 | 4.56% |
| New Haven | 856,895 | 23.97% |
| New London | 267,089 | 7.47% |
| Tolland | 150,913 | 4.22% |
| Windham | 117,182 | 3.28% |