Data / Rankings / Uninsured rate, ages 18 to 64 (US model-based estimate) / Counties in Connecticut

Counties in Connecticut by uninsured rate, ages 18 to 64 (US model-based estimate), 2024

Greater Bridgeport Planning Region had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 9 counties in 2024, at 12.4%. Lower Connecticut River Valley Planning Region had the lowest, at 5.2%. The median was 8% and the figure for Connecticut was 8.5%. Source: the U.S. Census Bureau.

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Highest12.4Greater Bridgeport Planning Region
Lowest5.2Lower Connecticut River Valley Planning Region
Median89 counties
Connecticut8.5History

Map of counties, 2024

Capitol Planning Region: 7.8 %Greater Bridgeport Planning Region: 12.4 %Lower Connecticut River Valley Planning Region: 5.2 %Naugatuck Valley Planning Region: 8.5 %Northeastern Connecticut Planning Region: 7 %Northwest Hills Planning Region: 8 %South Central Connecticut Planning Region: 8 %Southeastern Connecticut Planning Region: 7.8 %Western Connecticut Planning Region: 9.6 %
  • Under 7.5
  • 7.5 to 7.8
  • 7.8 to 8
  • 8 to 8.9
  • 8.9 and over
%, 2024. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2024

Greater Bridgeport Planning Region: 12.4 %Greater Bridgeport Planning Region12.4Western Connecticut Planning Region: 9.6 %Western Connecticut Planning Regi…9.6Naugatuck Valley Planning Region: 8.5 %Naugatuck Valley Planning Region8.5Northwest Hills Planning Region: 8 %Northwest Hills Planning Region8South Central Connecticut Planning Region: 8 %South Central Connecticut Plannin…8Capitol Planning Region: 7.8 %Capitol Planning Region7.8Southeastern Connecticut Planning Region: 7.8 %Southeastern Connecticut Planning…7.8Northeastern Connecticut Planning Region: 7 %Northeastern Connecticut Planning…7Lower Connecticut River Valley Planning Region: 5.2 %Lower Connecticut River Valley Pl…5.2Greater Bridgeport Planning Region: 12.4 %Greater Bridgeport Planning Region12.4Western Connecticut Planning Region: 9.6 %Western Connecticut Planning Region9.6Naugatuck Valley Planning Region: 8.5 %Naugatuck Valley Planning Region8.5Northwest Hills Planning Region: 8 %Northwest Hills Planning Region8South Central Connecticut Planning Region: 8 %South Central Connecticut Planning Region8Capitol Planning Region: 7.8 %Capitol Planning Region7.8Southeastern Connecticut Planning Region: 7.8 %Southeastern Connecticut Planning Region7.8Northeastern Connecticut Planning Region: 7 %Northeastern Connecticut Planning Region7Lower Connecticut River Valley Planning Region: 5.2 %Lower Connecticut River Valley Planning Region5.2
%. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Full ranking

RankCounties2024 (%)Change on 2023
1Greater Bridgeport Planning Region12.4+0.5 pts
2Western Connecticut Planning Region9.6-0.6 pts
3Naugatuck Valley Planning Region8.5+1.2 pts
4Northwest Hills Planning Region8+0.6 pts
4South Central Connecticut Planning Region8+0.8 pts
6Capitol Planning Region7.8+0.9 pts
6Southeastern Connecticut Planning Region7.8+1.4 pts
8Northeastern Connecticut Planning Region7+1.2 pts
9Lower Connecticut River Valley Planning Region5.2+0.1 pts

Other periods

About this ranking

People aged 18 to 64 without health insurance coverage of any kind, as a percentage of all people aged 18 to 64. United States: Census Bureau Small Area Health Insurance Estimates (SAHIE) for states and counties, all races, both sexes and all income levels.

A model-based single-year estimate that combines the American Community Survey with administrative records and population estimates, so every county gets a figure. Covers states and counties only, because the SAHIE dataset files have no national row. The Census Bureau advises comparing years from 2008 on only; 2013 is the updated release. Working-age adults; the rate for everyone under 65 is uninsured_rate_under_65.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties (Counties in Connecticut by uninsured rate, ages 18 to 64 (US model-based estimate), 2024) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip

MLA 9

Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties, Counties in Connecticut by uninsured rate, ages 18 to 64 (US model-based estimate), 2024. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/connecticut-counties. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Counties in Connecticut by uninsured rate, ages 18 to 64 (US model-based estimate), 2024. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/connecticut-counties.

Harvard

U.S. Census Bureau (2026) Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties, Counties in Connecticut by uninsured rate, ages 18 to 64 (US model-based estimate), 2024 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/connecticut-counties (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_connecticut_by_2024,
  author = {{U.S. Census Bureau}},
  title = {{Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties: Counties in Connecticut by uninsured rate, ages 18 to 64 (US model-based estimate), 2024}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/connecticut-counties. Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties: Counties in Connecticut by uninsured rate, ages 18 to 64 (US model-based estimate), 2024
PY  - 2026
DA  - 2026/08/06
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/connecticut-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/connecticut-counties.
N1  - Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Retrieved 2026-10-12.
ER  -
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Rank Counties in Connecticut by uninsured rate, ages 18 to 64 (US model-based estimate) using official data, and cite the source.
rank_places {"indicator":"uninsured_rate_18_64","level":"province","within":"Connecticut","limit":10}
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Questions

Which county has the highest uninsured rate, ages 18 to 64 (US model-based estimate)?

Greater Bridgeport Planning Region, with 12.4% in 2024, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, ages 18 to 64 (US model-based estimate)?

Lower Connecticut River Valley Planning Region, with 5.2% in 2024.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Uninsured rate, ages 18 to 64 (US model-based estimate): other rankings

Counties in Connecticut: more rankings