Annual State & County Population with Demographics
Each year, the U.S. Census Bureau provides detailed population estimates by age, sex, race, and Hispanic origin (ASRH) for state and county-level geographies. These datasets are compiled by decade into a standard format and re-released below. Starting in 2022, the Census Bureau adopted Connecticut’s 9 planning regions as county-equivalent areas for statistical reporting and ceased release of population estimates for the 8 historical counties. The files below refer to the new statistical areas as county-equivalent planning regions (CEPRs).
To support continued use of county-based data, the Connecticut Department of Public Health has released a parallel set of ASRH population estimates for the state's 8 counties for 2022, available here: 2022 County*ASRH & Methodology
In the datasets provided below, race is provided using the single and multiple race classification: White, Black, American Indian/Alaskan Native, Asian, Native Hawaiian or Other Pacific Islander, and Two or More races. This race classification differs from previously released estimates for 2000-2019 that used the single, bridged race classification, available here. Visit our race-ethnicity classification page for more information.
State-level ASRH estimate tables in Excel
By 18 Age Groups: 2000-2009 2010-2019 2020-2024
By 19 Age Groups: 2010-2019 2020-2024
County-level ASRH estimate tables in Excel
By 18 Age Groups: 2000-2009 2010-2019 2020-2024
By 19 Age Groups: 2020-2024
Datasets (in both csv and SAS):
Population estimates with demographic characteristics (age, sex, race, and Hispanic origin) for 2000 to present are provided below.
2020+ Postcensal Estimates for State and County/CEPR:
Available by single year of age for state and county/CEPR.
2010-2019 Postcensal* Estimates for State and County:
Available by single year of age for state and five-year age groups for county.
* Final, intercensal estimates will replace these postcensal estimates in summer 2025.
2000-2009 Intercensal Estimates for State and County:
Available by five-year age groups for state and county.
Recommended Citations: Citation information is included within each dataset.