Curt Newport

Curtis P. Newport, Boone County Treasurer

Welcome to the official site of the Boone County Treasurer’s Office. This is the place to find property tax information, learn about the tax collection process, pay your taxes online, view monthly financial reports, or learn more about the Treasurer’s Office.

This site is maintained and managed by Curt Newport, Boone County Treasurer. Feel free to email me with comments or suggestions for improving this site.

2021 tax collection schedule:

  • 2021 mobile home tax bills were mailed on February 23, 2021 and were due May 3rd.  If you have not received your mobile home tax bill, please call the Treasurer’s Office at 815-544-2666.

  • 2020 real estate tax bills (payable 2021) were mailed on April 30, 2021.  Due dates are June 1st and September 1st.  If you are paying taxes late, please call the Treasurer’s Office for a penalty calculation.

Delinquent Tax Publication Belvidere Republican Oct. 7, 2021

    Unpaid 2019 taxes (due 2020) were sold at tax sale on October 29, 2020. To redeem (pay) those taxes, contact the Boone County Clerk at 815-544-3103.

    Banks accepting property tax payments

    New! Pay by phone option.  Call 833-622-0700 to pay your tax bill by phone (credit/debit card or e-check, fees apply).

    Go paperless! Receive your tax bills electronically! Click here to learn more.

    You can now reprint your tax bill! Click here for instructions.

    Please read the back of your tax bill for important information and payment options.

    For questions about assessments, exemptions and address changes, please call the Boone County Assessment Office at 815-544-2958.

    For questions about tax rates, please call the Boone County Clerk’s Office at 815-544-3103.

    Duties of the County Treasurer

    Surplus Property Auction Information

    Tax Protest Information

    The Big Myth about property taxes

    Pay Your Tax Bill > online | at a bank | other options

    Lookup Your Tax Bill > view your bill | subscriber inquiry

    Reducing Your Tax Bill

    The Treasurer's Office is located in the Boone County Administration Campus.

    All information subject to our Terms of Use.