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Hamilton County, Illinois — Where History Meets Home

Department · Treasurer

Treasurer

SK
Sarah Kelly
County Treasurer
Hours
Mon – Fri · 8:00 a.m. – 4:00 p.m.
Important dates · 2025 payable 2026

Mark these on your calendar.

Last updated May 22, 2026 · Treasurer's Office
Real Estate Tax Bills Mailed
July 1, 2026
1st Installment Due
August 14, 2026
Penalty begins August 15, 2026
2nd Installment Due
September 14, 2026
Penalty begins September 15, 2026
Mobile Home Tax Bills Mailed
May 26, 2026
Mobile Home Tax Due
July 24, 2026
Penalty begins July 25, 2026
Tax sale (delinquent only)
TBD
9:00am Upstairs in Courtroom

Please be advised that entry is allowed ONLY through the East Doors of the Hamilton County Courthouse.

Tax payments can be made in the office, by mail, the DROP BOX installed on the South Side of the Courthouse, online at https://pay-hamiltoncountyil.com/ or by phone at 618-591-2419.

Real Estate Payments can also be made at local banks if paid on or before the due date.

Tax Payments made after the tax sale should be paid in the County Clerk’s Office with certified funds. (Cash, Cashier’s Check or Money Order)

Bad checks will have a $25.00 fee.

No Personal checks will be accepted 30 days prior to the Tax Sale

(35 ILCS 200/20-15):  “The failure or neglect of the collector to mail the bill, or the failure of the taxpayer to receive the bill, shall not affect the validity of any tax, or the liability for the payment of any tax.”

Who’s who in the office