Stephenson County Treasurer

10/19/2026

Final real estate property tax deadlines are fast approaching.

The last day to pay to avoid newspaper publication is October 20th, and personal checks are only accepted through October 26th.

The very last day to pay is November 9th, no later than 4:30 PM.

(Mobile home taxes are due November 20th.)

10/02/2026

2026 Mobile Home tax bills were mailed Wednesday. Please see the example below, noting that this year's bill color is bright yellow.
Due date is Friday, 11-20-2026.

09/30/2026

Friendly Reminder postcards were mailed this week to more than 1300 different property owners. Emphasis on the word FRIENDLY. If you received one, that means we don't have a record of one or both payments. These cards are sent as a courtesy because we know that sometimes bills can be forgotten or overlooked, or there may be any number of other circumstances that prevented on-time payment.

Again, FRIENDLY reminders, and intended to catch those who may have fallen through the cracks.

Please call the office at 815-235-8264 with questions or visit our Property Tax Inquiry portal at https://stephensonil.devnetwedge.com

08/31/2026

Reminder that 2nd installment of property taxes is due Friday. Please don’t wait until the last minute.

If mailing your payment, go inside the post office to ask for a hand postmark. We honor the official USPS postmark as the date paid. Dropping a check in a mailbox does not guarantee a dated postmark.

08/23/2026

📢 Stephenson County Property Tax Reminder
Property taxes are due in 12 days — September 4th.

Two of those days fall on a weekend, limiting payment options.

To avoid lines and last‑minute issues, please don’t wait until the final couple of days to make your payment. Taking care of it early helps ensure everything goes smoothly.

08/09/2026

REMINDER- the second installment of property taxes is due on September 4th.

08/09/2026

Bids for the Stephenson County Surplus property auction are due August 21st. We recommend the online option available at https://iltaxsale.com/new/index.php/county/Stephenson/STE The online process is easier, and no bid funds are required up front. Payment is required only if you are the successful highest bidder.

ILTaxSale.com advertises tax deed auctions for Joseph E. Meyer & Associates. Joseph E. Meyer & Associates collects unwanted tax liens for 80 counties in illinois. Once they obtain a tax deed the property is offered at public sale.

06/24/2026

We’re down to 2 days remaining to make an on-time payment for the 1st installment of property taxes.

Reminder that office hours are 8:30am-4:30 pm.

If paying at a county partner bank or directly in our office, you must bring your entire bill. The payment receipt is part of the bill itself.
If you’ve misplaced your bill, we can reprint a copy for you for $1.00 per parcel.

06/13/2026

Mailed property tax payments will be accepted as on-time with an official USPS postmark date of June 26, 2026, even if they are received after that date. Postmarks generated by any other postage meters are not acceptable for meeting the deadline.

If you need a same‑day postmark, please note that you must go to the post office counter and request a manual postmark.
This ensures your payment is properly dated.

06/13/2026

Thank you to all who have made payments thus far. Please note that the due date is now less than two weeks away. The office is generally open 8:30 am - 4:30 pm. All county offices will be closed to observe the Juneteenth federal holiday on June 19th.