Kevin Koenigstein
Treasurer

Appointed 2008

Elected 2010

Republican

Phone:  (618) 939-8681 ext 213

Software:  Fike & Fike

Population:  33,722

Zone:  I

Welcome to Monroe County, Illinois. 

The 2024 Monroe County real estate tax bills that are payable in 2025 were mailed on June 27, 2025.  The first installment is due September 19, 2025 and the second installment is due on November 14, 2025.  

Tax bills are available on-line at www.monroecountyil.gov.

The tax sale date is scheduled for January 15, 2026.

Office Hours:

• Monday - Friday 8:00 - 4:30.

Holiday Closings:

4th of July - July 4, 2025

Labor Day - September 1, 2025

Due Dates for 2024 taxes payable in 2025

1st Installment - September 19, 2025

2nd Installment -  November 14, 2025

Tax Sale Date - January 15, 2026

Tax Software: Fike and Fike

Contact Information:

• Property Tax..............(618) 939-8681 ext 213
• Email.........................kkoenigstein@monroecountyil.gov
• County Website........www.monroecountyil.gov
• Office Staff
  • Treasurer: Kevin W Koenigstein
  • Tax Deputy: Dawn 
  • Tax Deputy: Scott

Our Location:

Monroe County Treasurer’s Office

100 S. Main

Waterloo, IL 62298