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County · Connecticut
Western Connecticut Planning Region
637,013Population
2.6 %Change since 2020
3,057Net migration
3.5 %Unemployment rate
Facts
- Population
- 637,013 (2024)
- Change since 2020
- 2.6 %
- Net migration
- 3,057 (2023)
- Unemployment rate
- 3.5 % (2025)
- State
- Connecticut
- Population base, April 2020
- 620,884 (2020)
- Births
- 6,422 (2023)
- Births per 1,000 residents, 2023
- 10.1
- Deaths
- 4,795 (2023)
- Deaths per 1,000 residents, 2023
- 7.5
- Natural change, 2023
- 1,627
- International migration
- 7,848 (2023)
- Domestic migration
- -4,791 (2023)
- Net migration per 1,000, 2023
- 4.8
- Postal code
- CT
- FIPS code
- 09190
Sources: US Census Bureau — Population Estimates, Bureau of Labor Statistics — LAUS
Unemployment rate, annual average
| Period | Value |
|---|---|
| 2025 | 3.5 % |
| 2024 | 2.9 % |
| 2023 | 2.8 % |
| 2022 | 3.4 % |
| 2021 | 5.3 % |
| 2020 | 6.9 % |
| 2019 | 2.9 % |
| 2018 | 3.1 % |
| 2017 | 3.5 % |
| 2016 | 3.8 % |
| 2015 | 4.5 % |
| 2014 | 5.3 % |
Population estimates, 2020–2024
| Period | Value |
|---|---|
| 2024 | 637,013 |
| 2023 | 630,201 |
| 2022 | 625,454 |
| 2021 | 623,927 |
| 2020 | 618,762 |