The following table lists the states with the most people who did not have health insurance in 2018, the last year for which we have comprehensive figures as of May 2020. This is the most recent data available from the U.S. Census in 2010 compared against widely cited figures from the website Wallethub in 2018. Compare with our list of the Top 10 States with the Lowest Rate of Uninsured Residents.

Rank State % of Adults Uninsured Change from 2010 1. Texas 20.23 -6.00% 2. Oklahoma 16.31 -4.66% 3. Georgia 15.58 -6.05% 4. Mississippi 14.73 -6.06% 5. Florida 14.47 -8.27% 6. Alaska 13.83 -7.21% 7. Idaho 12.98 -6.64% 8. North Carolina 12.43 -6.05% 9. Nevada 12.24 -11.41% 10. South Carolina 12.24% -7.06% Source: U.S. Census Bureau, 2013. Wallethub, 2018