This is unchanged from the previous estimate.
New Haven County had the third largest population in Connecticut in 2021.
The US Census Bureau found more than 73 percent of counties in the US saw a natural decrease in population in 2021. This is up from a 55.5 percent increase in 2020.
The Midwest suffered the most sustained population decreases, with many counties along the US East Coast and through the Rocky Mountains seeing increases.
The US population continues to grow, though at a slower rate than before.
Connecticut Counties By Population Change from 2020 to 2021
| County | 2020 Estimated Population | 2021 Estimated Population | % Change in Population From Year to Year |
|---|---|---|---|
| Middlesex County | 163,923 | 164,759 | 0.5% |
| Tolland County | 149,650 | 150,293 | 0.4% |
| Fairfield County | 955,895 | 959,768 | 0.4% |
| New London County | 268,248 | 268,805 | 0.2% |
| Windham County | 116,240 | 116,418 | 0.2% |
| Litchfield County | 184,874 | 185,000 | 0.1% |
| New Haven County | 863,498 | 863,700 | 0% |
| Hartford County | 897,932 | 896,854 | -0.1% |
ORGANIZATIONS IN THIS STORY
Naugatuck• Wallingford Center• Cheshire Village• North Haven• Heritage Village• Orange• City of Derby• City of Waterbury• Town of Wolcott• City of Ansonia• Woodmont• East Haven• Branford Center• Guilford Center• City of Milford• Town of Prospect• Madison Center• City of West Haven• Town of Seymour• Town Of Guilford• Meriden• City of New Haven
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