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 2020, at 11.2%. Howard County had the lowest, at 3.9%. The median was 6.1% and the figure for Maryland was 6.7%. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest11.2Prince George's County
Lowest3.9Howard County
Median6.124 counties
Maryland6.7History

Map of counties, 2020

Allegany County: 5.5 %Anne Arundel County: 4.9 %Baltimore County: 6.5 %Calvert County: 3.9 %Caroline County: 9.2 %Carroll County: 4.3 %Cecil County: 5.9 %Charles County: 5 %Dorchester County: 6.9 %Frederick County: 4.9 %Garrett County: 7 %Harford County: 4.2 %Howard County: 3.9 %Kent County: 8.3 %Montgomery County: 7.2 %Prince George's County: 11.2 %Queen Anne's County: 5.2 %St. Mary's County: 5 %Somerset County: 5.9 %Talbot County: 7.4 %Washington County: 6.3 %Wicomico County: 8.3 %Worcester County: 7.6 %Baltimore city: 6.3 %
  • Under 4.9
  • 4.9 to 5.6
  • 5.6 to 6.5
  • 6.5 to 7.5
  • 7.5 and over
%, 2020. 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, 2020

Prince George's County: 11.2 %Prince George's County11.2Caroline County: 9.2 %Caroline County9.2Kent County: 8.3 %Kent County8.3Wicomico County: 8.3 %Wicomico County8.3Worcester County: 7.6 %Worcester County7.6Talbot County: 7.4 %Talbot County7.4Montgomery County: 7.2 %Montgomery County7.2Garrett County: 7 %Garrett County7Dorchester County: 6.9 %Dorchester County6.9Baltimore County: 6.5 %Baltimore County6.5Baltimore city: 6.3 %Baltimore city6.3Washington County: 6.3 %Washington County6.3Cecil County: 5.9 %Cecil County5.9Somerset County: 5.9 %Somerset County5.9Allegany County: 5.5 %Allegany County5.5Queen Anne's County: 5.2 %Queen Anne's County5.2Charles County: 5 %Charles County5St. Mary's County: 5 %St. Mary's County5Anne Arundel County: 4.9 %Anne Arundel County4.9Frederick County: 4.9 %Frederick County4.9Carroll County: 4.3 %Carroll County4.3Harford County: 4.2 %Harford County4.2Calvert County: 3.9 %Calvert County3.9Howard County: 3.9 %Howard County3.9Prince George's County: 11.2 %Prince George's County11.2Caroline County: 9.2 %Caroline County9.2Kent County: 8.3 %Kent County8.3Wicomico County: 8.3 %Wicomico County8.3Worcester County: 7.6 %Worcester County7.6Talbot County: 7.4 %Talbot County7.4Montgomery County: 7.2 %Montgomery County7.2Garrett County: 7 %Garrett County7Dorchester County: 6.9 %Dorchester County6.9Baltimore County: 6.5 %Baltimore County6.5Baltimore city: 6.3 %Baltimore city6.3Washington County: 6.3 %Washington County6.3Cecil County: 5.9 %Cecil County5.9Somerset County: 5.9 %Somerset County5.9Allegany County: 5.5 %Allegany County5.5Queen Anne's County: 5.2 %Queen Anne's County5.2Charles County: 5 %Charles County5St. Mary's County: 5 %St. Mary's County5Anne Arundel County: 4.9 %Anne Arundel County4.9Frederick County: 4.9 %Frederick County4.9Carroll County: 4.3 %Carroll County4.3Harford County: 4.2 %Harford County4.2Calvert County: 3.9 %Calvert County3.9Howard 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

RankCounties2020 (%)Change on 2019
1Prince George's County11.2+1 pts
2Caroline County9.2+0.7 pts
3Kent County8.30 pts
3Wicomico County8.3-0.2 pts
5Worcester County7.6+0.2 pts
6Talbot County7.4-0.6 pts
7Montgomery County7.2-0.9 pts
8Garrett County7-0.5 pts
9Dorchester County6.9-0.2 pts
10Baltimore County6.5-0.4 pts
11Baltimore city6.3-0.7 pts
11Washington County6.3-0.4 pts
13Cecil County5.9+0.1 pts
13Somerset County5.9-1.6 pts
15Allegany County5.5-0.3 pts
16Queen Anne's County5.2-0.5 pts
17Charles County5+0.2 pts
17St. Mary's County5-0.2 pts
19Anne Arundel County4.90 pts
19Frederick County4.9-0.6 pts
21Carroll County4.3-0.2 pts
22Harford County4.2-0.4 pts
23Calvert County3.9-0.3 pts
23Howard County3.9-0.6 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-2020-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), 2020) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-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), 2020. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/maryland-counties?period=2020. 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), 2020. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/maryland-counties?period=2020.

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), 2020 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-under-65/maryland-counties?period=2020 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_maryland_by_2020,
  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), 2020}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/maryland-counties?period=2020. 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-2020-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), 2020
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-2020-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-under-65/maryland-counties?period=2020
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/maryland-counties?period=2020.
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-2020-csv.zip. Retrieved 2026-10-12.
ER  -
Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in Maryland by uninsured rate, under 65 (US model-based estimate) using official data, and cite the source.
rank_places {"indicator":"uninsured_rate_under_65","level":"province","within":"Maryland","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=uninsured_rate_under_65&level=province&within=Maryland&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

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

Prince George's County, with 11.2% in 2020, 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 2020.

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