Breaking down the number of uninsured people in the U.S. gives you a better idea of who has no health insurance. States who have not implemented the Medicaid expansion have a higher uninsured rate than those that did.
Considering age and race, the uninsured are typically work-age adults, primarily 19 to 44. Further, Hispanics are more likely to have no coverage than non-Hispanic Blacks, non-Hispanic Whites and non-Hispanic Asians.