The DuPage County Health Department is a great resource for public health questions, including breast and cervical cancer screening and treatment, Tuberculosis treatment, adult immunizations, HIV services, Tobacco cessation, etc.
www.dupagehealth.org

DuPage County Human Services is a resource for assistance with a host of resources, including utility assistance, senior services, and short term medication assistance
www.dupageco.org/humanservices/

Prairie State Legal Services provides low or no cost legal resources to low income residents of our community.
www.pslegal.org/

Access Community Health Network, with three clinics in DuPage County (located in Bloomingdale, West Chicago, and Addison, provides sliding fee scale based medical services to individuals without health insurance.  They also welcome Medicaid enrollees, and provide family planning services.
www.accesscommunityhealth.net/

Individuals seeking medical assistance through Medicaid, as well as assistance with food stamps, ALLKIDS, and TANF, should contact the local Illinois Department of Human Services office.  Located at 146 W. Roosevelt Road in Villa Park, their phone number is 630-530-1120. 
For Medicaid, Food Stamp, and TANF Questions: www.dhs.state.il.us/page.aspx
For ALLKIDS question, and applications on line, www.allkids.com/