Data / Rankings / Uninsured rate, all ages (US) / Counties in Connecticut

Counties in Connecticut by uninsured rate, all ages (US), 2024

Greater Bridgeport Planning Region had the highest uninsured rate, all ages (US) of 9 counties in 2024, at 8.6%. Lower Connecticut River Valley Planning Region had the lowest, at 3.3%. The median was 4.7% and the figure for Connecticut was 5.4%. Source: the U.S. Census Bureau.

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Highest8.6Greater Bridgeport Planning Region
Lowest3.3Lower Connecticut River Valley Planning Region
Median4.79 counties
Connecticut5.4History

Map of counties, 2024

Capitol Planning Region: 4.5 %Greater Bridgeport Planning Region: 8.6 %Lower Connecticut River Valley Planning Region: 3.3 %Naugatuck Valley Planning Region: 4.8 %Northeastern Connecticut Planning Region: 3.8 %Northwest Hills Planning Region: 3.9 %South Central Connecticut Planning Region: 4.9 %Southeastern Connecticut Planning Region: 4.7 %Western Connecticut Planning Region: 7.2 %
  • Under 3.9
  • 3.9 to 4.5
  • 4.5 to 4.8
  • 4.8 to 5.8
  • 5.8 and over
%, 2024. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2024

Greater Bridgeport Planning Region: 8.6 %Greater Bridgeport Planning Region8.6Western Connecticut Planning Region: 7.2 %Western Connecticut Planning Regi…7.2South Central Connecticut Planning Region: 4.9 %South Central Connecticut Plannin…4.9Naugatuck Valley Planning Region: 4.8 %Naugatuck Valley Planning Region4.8Southeastern Connecticut Planning Region: 4.7 %Southeastern Connecticut Planning…4.7Capitol Planning Region: 4.5 %Capitol Planning Region4.5Northwest Hills Planning Region: 3.9 %Northwest Hills Planning Region3.9Northeastern Connecticut Planning Region: 3.8 %Northeastern Connecticut Planning…3.8Lower Connecticut River Valley Planning Region: 3.3 %Lower Connecticut River Valley Pl…3.3Greater Bridgeport Planning Region: 8.6 %Greater Bridgeport Planning Region8.6Western Connecticut Planning Region: 7.2 %Western Connecticut Planning Region7.2South Central Connecticut Planning Region: 4.9 %South Central Connecticut Planning Region4.9Naugatuck Valley Planning Region: 4.8 %Naugatuck Valley Planning Region4.8Southeastern Connecticut Planning Region: 4.7 %Southeastern Connecticut Planning Region4.7Capitol Planning Region: 4.5 %Capitol Planning Region4.5Northwest Hills Planning Region: 3.9 %Northwest Hills Planning Region3.9Northeastern Connecticut Planning Region: 3.8 %Northeastern Connecticut Planning Region3.8Lower Connecticut River Valley Planning Region: 3.3 %Lower Connecticut River Valley Planning Region3.3
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2024 (%)Change on 2023
1Greater Bridgeport Planning Region8.6+0.2 pts
2Western Connecticut Planning Region7.2-0.3 pts
3South Central Connecticut Planning Region4.9-0.2 pts
4Naugatuck Valley Planning Region4.8+0.4 pts
5Southeastern Connecticut Planning Region4.7+0.2 pts
6Capitol Planning Region4.5+0.3 pts
7Northwest Hills Planning Region3.9-0 pts
8Northeastern Connecticut Planning Region3.8+0.1 pts
9Lower Connecticut River Valley Planning Region3.3-0.1 pts

Other periods

About this ranking

People without health insurance coverage of any kind, as a percentage of the civilian noninstitutionalized population. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Coverage is what people reported at the interview, so the five-year figure averages five years of answers. People whose only coverage is the Indian Health Service count as uninsured. Active-duty military and people living in institutions are outside the universe. For single-year model-based county figures under 65, see uninsured_rate_under_65, uninsured_rate_18_64 and uninsured_rate_under_19 (SAHIE), a different source.

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. American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat. 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). American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs (Counties in Connecticut by uninsured rate, all ages (US), 2024) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat

MLA 9

American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs, Counties in Connecticut by uninsured rate, all ages (US), 2024. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat. Invokely, https://invokely.ai/rankings/uninsured-rate/connecticut-counties. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. Counties in Connecticut by uninsured rate, all ages (US), 2024. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate/connecticut-counties.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs, Counties in Connecticut by uninsured rate, all ages (US), 2024 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat, via Invokely: https://invokely.ai/rankings/uninsured-rate/connecticut-counties (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_connecticut_by_2024,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs: Counties in Connecticut by uninsured rate, all ages (US), 2024}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate/connecticut-counties. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary\_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs: Counties in Connecticut by uninsured rate, all ages (US), 2024
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat
L2  - https://invokely.ai/rankings/uninsured-rate/connecticut-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate/connecticut-counties.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat. Retrieved 2026-10-12.
ER  -
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Rank Counties in Connecticut by uninsured rate, all ages (US) using official data, and cite the source.
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Questions

Which county has the highest uninsured rate, all ages (US)?

Greater Bridgeport Planning Region, with 8.6% in 2024, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, all ages (US)?

Lower Connecticut River Valley Planning Region, with 3.3% 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, American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. Retrieved 2026-10-12.

Uninsured rate, all ages (US): other rankings

Counties in Connecticut: more rankings