Population
Each map shows ACS five-year estimates on that period’s boundaries. Boundary changes can affect nearby patterns.
2015–2019
county 2019 boundaries
county 2019 boundaries
Population (2015–2019)
Geography
Displaying: County (2019 definitions)
This data uses 2019 county definitions. Notably, Connecticut's 8 legacy counties were replaced by 9 planning regions in 2022.
Data Sources & Methodology
American Community Survey 5-Year Estimates (2019)
5-year estimates combine data from 2015 to 2019. This provides more reliable estimates for smaller geographic areas but represents an average over the 5-year period.
B01003
– Total Population
Universe: Total population
1 variable
Native geography:County (2019 definitions)
Display geography:County (2019 definitions)
Method:Direct — no transformation needed
Indicators
Population (2015–2019)
B01003_001E (raw value)
2020–2024
county 2022 boundaries
county 2022 boundaries
Population
Geography
Displaying: County (2022 definitions)
This data uses 2022 county definitions. Notably, Connecticut's 8 legacy counties were replaced by 9 planning regions in 2022.
Data Sources & Methodology
American Community Survey 5-Year Estimates (2024)
5-year estimates combine data from 2020 to 2024. This provides more reliable estimates for smaller geographic areas but represents an average over the 5-year period.
B01003
– Total Population
Universe: Total population
1 variable
Native geography:County (2022 definitions)
Display geography:County (2022 definitions)
Method:Direct — no transformation needed
Indicators
Population
B01003_001E (raw value)
- At most 98415.0
- At most 312591.0
- At most 730082.0
- At most 1579706.0
- Above 1579706.0
- Gray: unavailable data.