Data / Rankings / Uninsured rate, under 65 (US model-based estimate) / Counties in Maryland

Counties in Maryland by uninsured rate, under 65 (US model-based estimate)

Prince George's County had the highest uninsured rate, under 65 (US model-based estimate) of 24 counties in 2017, at 10.8%. Howard County had the lowest, at 3.9%. The median was 6.3% and the figure for Maryland was 7%. Source: the U.S. Census Bureau.

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Highest10.8Prince George's County
Lowest3.9Howard County
Median6.324 counties
Maryland7History

Map of counties, 2017

Allegany County: 5.9 %Anne Arundel County: 5.6 %Baltimore County: 6.1 %Calvert County: 4.1 %Caroline County: 8.4 %Carroll County: 4.6 %Cecil County: 5.6 %Charles County: 5 %Dorchester County: 7.3 %Frederick County: 5.4 %Garrett County: 7.4 %Harford County: 4.7 %Howard County: 3.9 %Kent County: 8.4 %Montgomery County: 8 %Prince George's County: 10.8 %Queen Anne's County: 5.4 %St. Mary's County: 5.2 %Somerset County: 8.5 %Talbot County: 8.5 %Washington County: 6.4 %Wicomico County: 8.1 %Worcester County: 7.8 %Baltimore city: 7.6 %
  • Under 5.1
  • 5.1 to 5.7
  • 5.7 to 7.4
  • 7.4 to 8.2
  • 8.2 and over
%, 2017. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2017

Prince George's County: 10.8 %Prince George's County10.8Somerset County: 8.5 %Somerset County8.5Talbot County: 8.5 %Talbot County8.5Caroline County: 8.4 %Caroline County8.4Kent County: 8.4 %Kent County8.4Wicomico County: 8.1 %Wicomico County8.1Montgomery County: 8 %Montgomery County8Worcester County: 7.8 %Worcester County7.8Baltimore city: 7.6 %Baltimore city7.6Garrett County: 7.4 %Garrett County7.4Dorchester County: 7.3 %Dorchester County7.3Washington County: 6.4 %Washington County6.4Baltimore County: 6.1 %Baltimore County6.1Allegany County: 5.9 %Allegany County5.9Anne Arundel County: 5.6 %Anne Arundel County5.6Cecil County: 5.6 %Cecil County5.6Frederick County: 5.4 %Frederick County5.4Queen Anne's County: 5.4 %Queen Anne's County5.4St. Mary's County: 5.2 %St. Mary's County5.2Charles County: 5 %Charles County5Harford County: 4.7 %Harford County4.7Carroll County: 4.6 %Carroll County4.6Calvert County: 4.1 %Calvert County4.1Howard County: 3.9 %Howard County3.9Prince George's County: 10.8 %Prince George's County10.8Somerset County: 8.5 %Somerset County8.5Talbot County: 8.5 %Talbot County8.5Caroline County: 8.4 %Caroline County8.4Kent County: 8.4 %Kent County8.4Wicomico County: 8.1 %Wicomico County8.1Montgomery County: 8 %Montgomery County8Worcester County: 7.8 %Worcester County7.8Baltimore city: 7.6 %Baltimore city7.6Garrett County: 7.4 %Garrett County7.4Dorchester County: 7.3 %Dorchester County7.3Washington County: 6.4 %Washington County6.4Baltimore County: 6.1 %Baltimore County6.1Allegany County: 5.9 %Allegany County5.9Anne Arundel County: 5.6 %Anne Arundel County5.6Cecil County: 5.6 %Cecil County5.6Frederick County: 5.4 %Frederick County5.4Queen Anne's County: 5.4 %Queen Anne's County5.4St. Mary's County: 5.2 %St. Mary's County5.2Charles County: 5 %Charles County5Harford County: 4.7 %Harford County4.7Carroll County: 4.6 %Carroll County4.6Calvert County: 4.1 %Calvert County4.1Howard County: 3.9 %Howard County3.9
%. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Full ranking

RankCounties2017 (%)Change on 2016
1Prince George's County10.80 pts
2Somerset County8.5-0.7 pts
2Talbot County8.5+0.5 pts
4Caroline County8.4-0.4 pts
4Kent County8.4+0.2 pts
6Wicomico County8.10 pts
7Montgomery County8+0.6 pts
8Worcester County7.8+0.5 pts
9Baltimore city7.60 pts
10Garrett County7.4+0.2 pts
11Dorchester County7.3-0.5 pts
12Washington County6.4-0.7 pts
13Baltimore County6.1-0.4 pts
14Allegany County5.9-0.5 pts
15Anne Arundel County5.6+0.3 pts
15Cecil County5.6-1.1 pts
17Frederick County5.4-0.1 pts
17Queen Anne's County5.4-0.2 pts
19St. Mary's County5.2-0.4 pts
20Charles County50 pts
21Harford County4.7-0.1 pts
22Carroll County4.6+0.3 pts
23Calvert County4.1-0.1 pts
24Howard County3.9-0.5 pts

Other periods

About this ranking

People under 65 without health insurance coverage of any kind, as a percentage of all people under 65. 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. People 65 and over are left out because nearly all of them have Medicare.

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, under 65, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-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, under 65, all races, both sexes, all income levels, states and counties (Counties in Maryland by uninsured rate, under 65 (US model-based estimate), 2017) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip

MLA 9

Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties, Counties in Maryland by uninsured rate, under 65 (US model-based estimate), 2017. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/maryland-counties?period=2017. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. Counties in Maryland by uninsured rate, under 65 (US model-based estimate), 2017. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/maryland-counties?period=2017.

Harvard

U.S. Census Bureau (2026) Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties, Counties in Maryland by uninsured rate, under 65 (US model-based estimate), 2017 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-under-65/maryland-counties?period=2017 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_maryland_by_2017,
  author = {{U.S. Census Bureau}},
  title = {{Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties: Counties in Maryland by uninsured rate, under 65 (US model-based estimate), 2017}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/maryland-counties?period=2017. Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties: Counties in Maryland by uninsured rate, under 65 (US model-based estimate), 2017
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-2017-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-under-65/maryland-counties?period=2017
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/maryland-counties?period=2017.
N1  - Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2017-csv.zip. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest uninsured rate, under 65 (US model-based estimate)?

Prince George's County, with 10.8% in 2017, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, under 65 (US model-based estimate)?

Howard County, with 3.9% in 2017.

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, under 65, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Uninsured rate, under 65 (US model-based estimate): other rankings

Counties in Maryland: more rankings