Boone County Treasurer's Office

Curtis P. Newport, Boone County Treasurer

Browsing Posts in Dates & Deadlines

Real estate tax bills were mailed on May 9, 2012.

Due dates are
June 11, 2012 first installment
September 4, 2012 second installment

If you have not yet received your tax bill, please call the Treasurer’s Office at 815-544-2666.

If you have not yet paid your first installment, please call the Treasurer’s Office for a penalty calculation at 815-544-2666.  Please note that banks cannot accept late payments, they must be mailed or delivered to the Treasurer’s Office.

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.

Press release

April 30, 2010

Boone County Tax Bills Due June 4th and September 1st, 2010

Boone County Treasurer Curtis Newport has announced that 2009 real estate tax bills will be mailed on May 4th to 24,231 parcels.  The due dates for the two installments are June 4th and September 1st, 2010.

The treasurer reminds all property owners to read their bills carefully, including the back side which provides information on payment options, phone numbers for those who have questions and penalties for late payment.

Tax payments are accepted at any bank in Boone County. Bring your entire bill to the bank if you want it stamped to show proof of payment. A list of banks, locations and hours is available on the treasurer’s web site,

Payments sent by mail must be postmarked on or before the due date.

Those who wish to pay at the Treasurer’s Office are reminded that the office has moved to the new Boone County Administration Campus at 1212 Logan Avenue. Payments cannot be accepted at the Courthouse.

Contact the following offices with questions:

Assessments, exemptions or address changes – Supervisor of Assessments Office 815-544-2958

Tax rates – County Clerk’s Office 815-544-3103

Collection and distribution of taxes – County Treasurer’s Office 815-544-2666

March 3, 2010

Mobile Home tax bills were mailed today to approximately 1,200 mobile homes in Boone County.  The 2010 Mobile Home Local Services Tax is due May 3, 2010.

State law requires a penalty of $25 per month for delinquent mobile home taxes.  Remember to pay on time to avoid this penalty!

If you were age 65 or older or before January 1, 2010, you are elligible for a 20% discount off your mobile home taxes.  To apply for this discount, bring your driver’s license or state-issued ID card to the Treasurer’s Office during business hours (8:30 – 5:00 Monday-Friday).  Our office is located at 1212 Logan Avenue, Belvidere.

More information on the mobile home tax here.