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 2015, at 11.3%. Harford County had the lowest, at 4.4%. The median was 6.9% and the figure for Maryland was 7.4%. Source: the U.S. Census Bureau.

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Highest11.3Prince George's County
Lowest4.4Harford County
Median6.924 counties
Maryland7.4History

Map of counties, 2015

Allegany County: 6.4 %Anne Arundel County: 5.7 %Baltimore County: 6.8 %Calvert County: 4.6 %Caroline County: 8.7 %Carroll County: 4.4 %Cecil County: 6.2 %Charles County: 5 %Dorchester County: 8.6 %Frederick County: 5.7 %Garrett County: 7.5 %Harford County: 4.4 %Howard County: 4.5 %Kent County: 9.1 %Montgomery County: 8.5 %Prince George's County: 11.3 %Queen Anne's County: 5.8 %St. Mary's County: 5 %Somerset County: 9.4 %Talbot County: 8.2 %Washington County: 6.9 %Wicomico County: 8.1 %Worcester County: 7.7 %Baltimore city: 8.2 %
  • Under 5
  • 5 to 6.2
  • 6.2 to 7.7
  • 7.7 to 8.5
  • 8.5 and over
%, 2015. 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, 2015

Prince George's County: 11.3 %Prince George's County11.3Somerset County: 9.4 %Somerset County9.4Kent County: 9.1 %Kent County9.1Caroline County: 8.7 %Caroline County8.7Dorchester County: 8.6 %Dorchester County8.6Montgomery County: 8.5 %Montgomery County8.5Baltimore city: 8.2 %Baltimore city8.2Talbot County: 8.2 %Talbot County8.2Wicomico County: 8.1 %Wicomico County8.1Worcester County: 7.7 %Worcester County7.7Garrett County: 7.5 %Garrett County7.5Washington County: 6.9 %Washington County6.9Baltimore County: 6.8 %Baltimore County6.8Allegany County: 6.4 %Allegany County6.4Cecil County: 6.2 %Cecil County6.2Queen Anne's County: 5.8 %Queen Anne's County5.8Anne Arundel County: 5.7 %Anne Arundel County5.7Frederick County: 5.7 %Frederick County5.7Charles County: 5 %Charles County5St. Mary's County: 5 %St. Mary's County5Calvert County: 4.6 %Calvert County4.6Howard County: 4.5 %Howard County4.5Carroll County: 4.4 %Carroll County4.4Harford County: 4.4 %Harford County4.4Prince George's County: 11.3 %Prince George's County11.3Somerset County: 9.4 %Somerset County9.4Kent County: 9.1 %Kent County9.1Caroline County: 8.7 %Caroline County8.7Dorchester County: 8.6 %Dorchester County8.6Montgomery County: 8.5 %Montgomery County8.5Baltimore city: 8.2 %Baltimore city8.2Talbot County: 8.2 %Talbot County8.2Wicomico County: 8.1 %Wicomico County8.1Worcester County: 7.7 %Worcester County7.7Garrett County: 7.5 %Garrett County7.5Washington County: 6.9 %Washington County6.9Baltimore County: 6.8 %Baltimore County6.8Allegany County: 6.4 %Allegany County6.4Cecil County: 6.2 %Cecil County6.2Queen Anne's County: 5.8 %Queen Anne's County5.8Anne Arundel County: 5.7 %Anne Arundel County5.7Frederick County: 5.7 %Frederick County5.7Charles County: 5 %Charles County5St. Mary's County: 5 %St. Mary's County5Calvert County: 4.6 %Calvert County4.6Howard County: 4.5 %Howard County4.5Carroll County: 4.4 %Carroll County4.4Harford County: 4.4 %Harford County4.4
%. 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

RankCounties2015 (%)Change on 2014
1Prince George's County11.3-2.3 pts
2Somerset County9.4-1.3 pts
3Kent County9.1-1.2 pts
4Caroline County8.7-1.8 pts
5Dorchester County8.6-1.3 pts
6Montgomery County8.5-1.5 pts
7Baltimore city8.2-1.6 pts
7Talbot County8.2-1.4 pts
9Wicomico County8.1-2.6 pts
10Worcester County7.7-2.5 pts
11Garrett County7.5-1.9 pts
12Washington County6.9-1.2 pts
13Baltimore County6.8-1.6 pts
14Allegany County6.4-1.1 pts
15Cecil County6.2-1 pts
16Queen Anne's County5.8-0.9 pts
17Anne Arundel County5.7-0.9 pts
17Frederick County5.7-1 pts
19Charles County5-1.1 pts
19St. Mary's County5-1.4 pts
21Calvert County4.6-0.9 pts
22Howard County4.5-0.7 pts
23Carroll County4.4-1.1 pts
23Harford County4.4-1.3 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-2015-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), 2015) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-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), 2015. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/maryland-counties?period=2015. 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), 2015. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/maryland-counties?period=2015.

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), 2015 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-under-65/maryland-counties?period=2015 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_maryland_by_2015,
  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), 2015}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/maryland-counties?period=2015. 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-2015-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), 2015
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-2015-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-under-65/maryland-counties?period=2015
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/maryland-counties?period=2015.
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-2015-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 11.3% in 2015, according to the U.S. Census Bureau.

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

Harford County, with 4.4% in 2015.

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