That represents almost 15% of the entire population, including Americans of all ages.
The CDC found that 54-and-a-half million did not have insurance for part of the year.
That is almost 19% of the population.
Still, the numbers are lower than previous estimates.
Among Americans of working age between the ages of 18 and 64, 19.8% did not have health insurance.
Texas was the state with the most people uninsured, with 23-point-eight percent of the population not covered.