Roughly 20 million more Americans have health insurance now than when President Obama’s health care law was passed in 2010. But as Mr. Obama prepares to leave office, there are still about 24 million adults with no coverage, according to a survey by the Commonwealth Fund, a health research group. That translates to an uninsured rate of about 13 percent, down from 20 percent in 2013. Who are the remaining uninsured?

Increasingly, Hispanics

Forty percent of the uninsured are Hispanic. That’s up from 29 percent in 2013, before the main insurance coverage options under the health care law took effect. One obvious reason is that undocumented immigrants are generally not eligible for the coverage offered under the law. Still, the uninsured rate among Hispanics has fallen to 29 percent, from 36 percent in 2013.

Forty-one percent of the uninsured are white (down from 50 percent in 2013), 12 percent are black (down from 13 percent) and 6 percent are Asian and other races (unchanged from 2013).

Millennials

Almost half of the uninsured are young, ranging in age from 19 to 34. But the survey found that the percentage of young adults without health insurance had dropped quite a bit, to 18 percent now from 28 percent in 2013.