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

DuPage County Human Services contains 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 medical services at reduced rates for individuals unable to pay higher costs, especially patients 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. 
IDHS office: 146 W. Roosevelt Rd., Suite 2, Villa Park, IL 60181 (Phone: 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/