According to data from the Census Bureau,  in 2014

• 12% of people under age 65 had no health insurance
• 6% of all children were uninsured
• those ages 26-34 were least likely to be insured (18% uninsured)

Between 2008 and 2013, the uninsured rate was relatively stable. In 2014, the uninsured rate decreased by nearly 3%, which was the largest change in the uninsured rate throughout this period.

In 2014, non-Hispanic Whites had the lowest uninsured rate among race and Hispanic-origin groups, at 8%. The uninsured rates for Blacks and Asians were higher than for non-Hispanic Whites, at 12% and 9%, respectively. Hispanics had the highest uninsured rate in 2014, at 20%.

According to survey data from the National Center for Health Statistics, in 2014

• 6% of children below the poverty level were uninsured
• 19% of children between 100%-200% of the poverty level were uninsured
• 4% of children above 200% of the poverty level were uninsured

For adults ages 18-64, in 2012 the NCHS data show

• 32% of those below the poverty level were uninsured
• 31% of those between 100%-200% of the poverty level were uninsured
• 9% of those above 200% of the poverty level were uninsured

Sources:

Smith, Jessica C. and Carla Medalia, Health Insurance Coverage in the United States: 2014, U.S. Census Bureau, Current Population Reports, P60-253, Health Insurance Coverage in the United States: 2014, U.S. Government Printing Office, Washington, DC, 2015. (PDF). Accessed 9/25/2015
Cohen RA, Martinez ME. Health insurance coverage: Early release of estimates from the National Health Interview Survey, 2014. National Center for Health Statistics. September 2013. (PDF) Accessed 9/25/2015