The Tax division of our office provides tax services including annually calculating the rate for various taxing districts by working with taxing authorities and the Board of Review. We make sure that the rates used in calculating taxes are within the legal limits established by law or the vote of the people.

The Clerk also collects all delinquent (past due) taxes from sold properties and issues tax deeds. The tax redemption area of our office computes and collects payments for past due or unpaid taxes. Call our tax line at (815) 319-4253 for questions or more information.

Sales Tax information from the Illinois Department of Revenue website

2024 Tax Levies (along with a Truth in Taxation Certificate of Compliance) are due by Statute the last Tuesday in December of each year.  This year, the last Tuesday falls on December 31, 2024.  The Winnebago County Clerk's Office will be closed on December 24th and December 25th.  Please plan accordingly in order to avoid filing late.           Thank you.

The 2023 Tax Extension was completed on 4/22/24. Certified Tax Computation Reports have been mailed out to all taxing districts. Additional 2023 tax reports are posted below.