Cass County Illinois Official Website


Welcome to Cass County! Formed in 1837, we are a small, rural county along both the Illinois and Sangamon Rivers, and straight west of the capital city of Springfield. As of the 2010 US Census we have a population of 13,642, making us one of the least populated counties in Illinois. Although we are small in size, we have a large immigrant population that has grown in the last twenty years, making Cass County one of the most diverse counties in downstate Illinois. We also represent a top 10% Health Department in the US, in the Cass County Health Department.


Check out all of our Departments and Department Heads! Their contact information is on each of their webpages.
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Elected Officials

Check out all of our Elected Officials! Their contact information is on each their webpages.
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County Info

Check out our County Information, which includes meeting minutes/agendas, budgets, audits, and different facts about Cass County!
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Contact Us

Check out the hours, address, and phone number of the Courthouse here! We would be glad to hear from you!
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     Property Tax.PNG

Property Tax Bills mailed June 11,2021

1st installment due on 07/16/2021

2nd installment due on 09/03/2021


Public Hearing:

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IL Supreme Court Rules Committee-Public Hearing 07/21/2021

Online GIS portal and Property Search:

Cass County Map

To contact emergency services, please call "911" if possible. Otherwise, see the non-emergency numbers that are listed. Cass County Sheriff's Department number is (217) 452-7718, which is listed below.


Town Fire Police
(217) 997-5858
(217) 452-7718
(217) 476-3317
(217) 476-8191
(217) 323-1191
(217) 323-3131
(217) 458-2400
(217) 452-7718
(217) 452-7500
(217) 452-3500