ACA and the Uninsured in Illinois
Prior to launch of the ACA marketplace in 2014, nearly 1 out of every 7 working age adults in Illinois lacked health insurance. Although the ACA greatly reduced the proportion of Illinois residents living without health insurance, hard-to-reach populations continue to have lower coverage rates.

The Affordable Care Act
About 217,000 people enrolled on the Marketplace in the first open enrollment period, ending April 2014. Enrollment for 2018, the fifth year, was 335,000, down 6%t from the high of the previous year.
The Uninsured
Clusters of uninsured remain and, as new data becomes available, we can follow the effects of the changes in access to health insurance.
- Illinois Marketplace Eligibles for Fall 2015 • Map • Table
- Illinois uninsured by census tract 2012 • Map • with counties • with legislative districts
- Illinois uninsured 2011 • Map • Charts
- Illinois Marketplace population 2011 • Map • Charts
- Illinois Medicaid population 2011 • Map • Charts
- Illinois undocumented 2011 • Map • Charts
More Resources
- Illinois uninsured by county - 2012-18 from CountyHealthRankings.org
- Illinois health insurance marketplace: history and news - HealthInsurance.org
- Effect of the Affordable Care Act in Illinois - Ballotpedia
- State Health Facts at a Glance: Illinois coverage and uninsured - from KFF.org
- Marketplace open enrollment public use files - by county and ZIP code from CMS
- Characteristics of health insurance, and of uninsured - Tables S2701 and S2702, American Community Survey
- ACA adult Medicaid enrollment - HFS
- Health insurance premiums under the ACA vs. AHCA - KFF.org (2017)
- Healthcare page - Center for American Progress (CAP)
- Americans with pre-existing conditions - by congressional district from CAP
- Job loss due to ending Medicaid expansion - by state from the Economic Policy Institute (2017)
- Hospitals as economic drivers - by state from the American Heart Association