Most uninsured people, US counties
US counties with the most residents lacking health insurance, as of the 2024 American Community Survey. Ranked by number of people, not the uninsured rate. Harris County, Texas leads at 1,005,342. 3,144 counties qualify in total. Texas carries 7 of the top 25 entries.
UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES
Frequently asked
Which county has the highest uninsured residents?
Harris County, Texas ranks #1 with 1,005,342 (2024 American Community Survey).
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?
3,144 counties qualify after filtering for population minimums and data availability. The ranking covers 2024 ACS 5-year 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, American Community Survey 5-year estimates (2024).