Most uninsured people, US counties · 2020
US counties with the most residents lacking health insurance, as of the 2020 American Community Survey. Ranked by number of people, not the uninsured rate. Harris County, Texas leads at 951,568. 3,135 counties qualify in total. Texas carries 8 of the top 25 entries.
UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS
Frequently asked
Which county has the highest uninsured residents?
Harris County, Texas ranks #1 with 951,568 (2020 Decennial Census).
What are the top 5 counties by uninsured residents?
Harris County, Texas, Los Angeles County, California, Dallas County, Texas, Maricopa County, Arizona, Cook County, Illinois.
How many counties are in this ranking?
3,135 counties qualify after filtering for population minimums and data availability. The ranking covers 2020 Decennial Census data.
How is uninsured residents measured?
Number of civilian noninstitutionalized residents without health insurance (ACS S2701). The raw-count companion to the uninsured rate. Source: US Census Bureau, 2020 Decennial Census.