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Education Programs, Volunteer Opportunities & Public Events

New Education Programs, Registration for Camp Russell, Afton Forest Preserve Public Star Gazing, Volunteer Opportunities & Public Events have been posted by the DeKalb County Forest Preserve. Please click here for more information on these opportunities!

Is your address correct for your tax bill?

Is your address correct for your tax bill? Have you moved in the last year? An incorrect mailing address could prevent you from receiving your tax bill and other important notices in a timely fashion. The Chief County Assessment Office requests that anyone who has moved and/or has a different mailing address than previously listed to contact us. Please click here for more information.

2023 Mobile Home Taxes Due May 1, 2023

The 2023 Mobile Home taxes are due by Monday, May 1, 2023. You can pay online, in our office, or via mail. Click this card to pay online. Online payment instructions can be found in the FAQ section of the Treasurer’s page at Please contact us at 815-895-7112 with any questions.