Do you need a smog check in Illinois?

I’m moving to Illinois for a job, and I’m excited about the prospect! However, I have an older-model vehicle, and I’m not sure it will pass an emissions test. Does Illinois require cars to have a smog check?

Eric Schad · Answered on Nov 21, 2022
Reviewed by Shannon Martin, Licensed Insurance Agent.
Only the 10 most populous counties in Illinois require a smog check, and are mostly located around Chicago and across the river from St. Louis, Missouri. These checks are required every two years to renew your registration. If you’re moving to one of these counties, you need a smog check in Illinois:
  • Cook County
  • Dupage County
  • Lake County
  • Kane County
  • Kendall County
  • McHenry County
  • Madison County
  • Monroe County
  • St. Clair County
  • Will County
Getting the test is easy—just head to an approved Illinois State testing facility. It should only take a few minutes, although you may wait in line for quite some time unless you have an appointment.
After your car passes the smog check—hopefully it will—the next step is to start shopping for Illinois car insurance. The Jerry app is a great place to start, offering comparable quotes that get you the coverage you need at a price you’ll love.
Jerry is a trustworthy super app and insurance comparison tool that collects quotes from over 55 top-rated insurers in just 45 seconds. After you find a great rate, Jerry can help you buy new insurance and cancel your old policy. Users save an average of $800+ per year.
MORE: [Everything you need to know about Illinois’s texting and driving laws (
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