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About 7.2 million working-age people had health insurance in 2016, up 11% from 6.5 million in 2012. Those without coverage fell from 1.5 million to 760,000, a 48% drop. The largest portion of this shift is attributable to the Medicaid expansion. Medicaid covered 1.3 million working-age residents (17.5%) in 2016, up from 864,000 in 2012 (13.2%), a 49% increase.
Lake County saw a pronounced increase in Medicaid for this age group. Meanwhile, there was close to a fivefold increase in the central area of Chicago and almost a tripling in western Kane County. Medicaid coverage in 2016 ranges from a low of 3% of working-age residents in the Lincoln Park area of Chicago to a high of 57% in the Chicago neighborhoods of surrounding Englewood.