Warren County Treasurer





100 W. Broadway
309-734-8536 (fax 309-734-0313)
Monmouth, IL 61462 warrencountytreasurer@outlook.com
Monday - Friday, 8:00 AM - 12:00 PM & 1:00 PM - 4:30 PM www.warrencountyil.com


  Danielle B. Cox
  Warren County Treasurer


The Warren County Treasurer’s office is located at 100 W. Broadway on the 2nd floor of the courthouse.  (please use east side entrance)


Warren County Real Estate Property Tax bills were mailed on 4/28/2023.

1st Installment for property tax bills are 6/1/2023.

2nd Installment for property tax bills are 9/1/2023.


   Mobile Home Taxes were mailed on 03/24/2023.

Mobile Home Taxes are due on 05/31/2023.

Please call if you have any questions.  Thank you for your patience! 



Real Estate Taxes due dates are as close to June 1st and September 1st as possible annually. The Tax Sale is held the 3rd Monday of October each year. We have a County Trustee program and all unsold parcels are purchased by the Trustee. All redemptions made after the Sale are made directly to the County Clerks office (309/734-4612).
We will have a Sealed Bid Sale of County Trustee parcels. Check with the Treasurer each year for the date. Auction books are available for purchase at the Treasurer's Office.

MOBILE HOME TAX COLLECTION: Mobile Home tax bills are due on May 31, 2023. There is a $25.00 monthly delinquent fee after May 31st, 2023.


Please make arrangements to purchase a dog tag or let us know that you no longer have the dog.  If you no longer have your dog please give us an approximate date and reason why you no longer have the dog so that we can update our records.

 You have 30 days to register your dog which is based off your last vaccination date. Example: If your dog got vaccinated on 05/05/2022 then you have 30 days from 05/05/2023 to get shots and tags before late fees apply.   Please do not rely on your vet’s office to give us proof of vaccination. 

You must purchase a new tag if you still own the dog. Please provide payment and proof to the Treasurer’s Office that your dog is currently inoculated for rabies.  Below are payment options and a chart for fees.

Once you get your dog vaccinated, (1 year or 3 year vaccine) it is your responsibility to come and register your dog (1 year tag or 3 year tag).  Please do not rely on your vet’s office to give us proof of vaccination.

Payment may be made in the form of cash, check, debit/credit card or the drop box located on the east side of the courthouse.  A convenience fee does apply when using a debit or credit card.  Payments may also be made by phone with a debit/credit card IF we have the dog’s Rabies Certificate in our office.  If paying over the phone or mailing a check, we will mail you your tag.




1 month - 3 months late:              1 year tag: $10 late fee + $10.00 tag                          TOTAL: $20.00

1 month - 3 months late:              3 year tag: $10 late fee + $30.00 tag                          TOTAL: $40.00


3 months – 6 months late:           1 year tag $15 late fee + $10.00 tag                            TOTAL: $25.00

3 months – 6 months late:           3 year tag $15 late fee + $30.00 tag                            TOTAL: $45.00


6 months – 12 month late:          1 year tag $20 late fee + 10.00 tag                              TOTAL: $30.00       

6 months – 12 month late:          3 year tag $20 late fee + 30.00 tag                              TOTAL: $50.00


12 months - 24 months late:      1 year tag $30 late fee + $10.00 tag                            TOTAL: 40.00

12 months - 24 months late:      3 year tag $30 late fee + $30.00 tag                            TOTAL: 60.00


Rabies Certificates may be emailed to our office at warrencountytreasurer@outlook.com  wctreasurerdeputy@outlook.com or warrencountydogtags@gmail.com

You may go to the Treasurer’s Office on the second floor of the Courthouse.

Office hours:  8:00 a.m. to 12:00 p.m. & 1:00 p.m. to 4:30 p.m.  Monday through Friday excluding holidays.

You may call the Treasurer’s Office at 309-734-8536, mail the Rabies Certificate with required payment to 100 West Broadway, Monmouth, IL 61462, or email the Rabies Certificate to the Treasurer’s office and call to make a payment over the phone.  We will then mail you your newly purchased tag. 

                                                            ORDINANCE VIOLATION(S) - TICKETS

Please contact the Treasurer’s Office within thirty (30) days of the date of this letter.  Due to Warren County Ordinance# 06-10-11 Section 6 – Enforcement (b) Failure to purchase a rabies inoculation tag within 30 days of vaccination and within 30 days of the anniversary date each year thereafter shall result in a citation being issued by the Animal Control Warden.  If you receive a Warren County ordinance violation, please be advised that you will not be able to pay your citation in our office until we have proof of vaccination and you are current on your dog tags.  Please do not rely on your vet’s office to give us proof of vaccination.



  1. Warren Co. Animal Control will issue a ticket giving a court date.  If you do not take care of the ticket with the Warren Co. Treasurer’s office (have to have proof of current rabies vaccination in order to pay ticket) before the court date, you have to SHOW UP IN COURT.
  2. If you miss that court date, the Warren Co. Circuit Clerk will issue a Summons (fees will be associated with summons) to the Sheriff and a Sheriff’s Deputy will serve you.  You will still need to pay the ticket with the Treasurer (as long as you have current rabies vaccination), but you also MUST APPEAR on the court date of the Summons.
  3. If you FAIL TO APPEAR in court once SUMMONED, that will lead  the Court finding you in DEFAULT (guilty) and will result in a fine and court costs that will need to be paid in the Warren Co. Circuit Clerk’s office (3rd floor).


Dogs are to be vaccinated at 16 weeks (4 months) of age for rabies and each year after.

The fee for registration is $10.00 for a 1-year rabies tag.  If the dog isn’t spayed or neutered, it will an additional $45.00 (non-alter fee) (this does not include the $10.00 tag fee).

If you are in your first year/first time registering the $45.00 non-alter fee is waived. 

If you get a three-year rabies vaccination, we do offer a three-year tag. If your dog is fixed/altered the fee is $30.00 ($10.00 for each year).  If your dog is not fixed/altered and you would like a 3-year rabies tag the price is $165.00. These prices do not include late fees or tickets. 

Per Ordinance 06-10-11 Animal Control Section 4 – Altered (fixed) Dogs, at the time of the second registration, any unaltered dog, whether male or female and with or without permanent identification, shall be assess a $45.00 fee.  Any person purchasing a subsequent alteration fee after the anniversary date shall pay a late fee.   This fee shall be assessed yearly and will be paid in addition to other applicable fees.  Any altered or confined dogs shall be exempt from this fee.  If surgery would pose a serious health risk to a dog due to pre-existing medical condition, a medical exemption may be granted and obtained from a veterinarian.  Every owner must present or mail two copies of the Warren County Rabies Certificate to the Warren County Treasurer’s office with a veterinarian’s signature verifying permanent alteration at the time of registration.                                                                                                                   

 Additional reminders:

Once you get your dog vaccinated, (1 year or 3 year vaccine) it is your responsibility to come and register your dog (1 year tag or 3 year tag).  

You cannot get a rabies vaccine from Farm King. A licensed vet can only give rabies vaccine.   

Rabies tags help get dogs home faster if their tags are attached to collars. 

Warren County Animal Control and the Warren County Treasurer’s Office has access to the dog tag list. 

Microchipping dogs help. Microchipped dogs do not tell you your dog is missing but can tell you if they are found.

Animal Control can run a scanner over the dog to find the microchip number and look it up and find your information as long as it’s updated.  

There are different GPS collars or Apple airtags that you can you put on your dog’s collars if you would like to have an idea where they are at all times.  

The Warren County Treasurer’s Office offers a payment option through GovTechService,Inc. To pay your Warren County taxes over the Internet using most major credit cards:
1.  Go to http://www.govtechtaxpro.com
2.  On the right side, click on search and pay tax bill
3.  Select:  Illinois
4.  Select:  Warren County
5.  Search by either owner name or parcel number.
6.  Check the box of payment and add to shopping cart.
7.  Select:  Method of payment, check box acknowledge service fee and proceed to checkout.
8.  Select:  Pay Credit Card
9.  Enter billing information and credit card information
10. Finish


There will be a convenience fee charged by GovTechService,Inc.

Tax Bill information at https://il1374.cichosting.com/atasportal/


Real Estate Tax Collection
Mobile Home Tax Collection
Sealed Bid Sale
Animal Control Registration (Dog Tags)
Online Tax Payment



03/24/2023                Postmark for Mobile Home Taxes

05/31/2023                Mobile Home Due Date

6/1/2023                   $25.00 monthly delinquent fee

4/28/2023                 Property Tax bills were mailed

5/1/2023                   Participating banks will accept property tax payments

5/1/2023                  Payments can be made online with credit/debit cards

6/1/2023                  1st installment due

6/2/2023                   1.5 monthly interest will be charged

9/1/2023                   2nd installment due

9/2/2023                   1.5 monthly interest will be charged

9/29/2023                Certified letter post-marked no longer except personal checks, additional $10.00 fee added

10/20/2023              sealed bid auction 2019 payable 2020

10/11//2023                Publication date

 10/23/23                        Judgment day at 10:00 A.M.

10/26/23                 Annual tax sale of delinquent taxes at 10:00 A.M. (RAMS2)