Despite major improvements in the uninsured numbers, many with insurance find it's not affordable.
That’s slightly lower than this year’s gain of 10 percent, the survey says, but still in line with the state average for recent years.
The new studies find the uninsured include so-called "young invincibles," those 18 to 34, Latinos and seasonal workers.
Last year, some people faced delays to see if they qualified for government insurance.
Customers can enroll online, by phone or at 2,700 of Wal-Mart's more than 4,000 stores, starting Oct. 10.
The Census Bureau also found nearly 63 percent of low-income Colorado children are covered by government health insurance programs.