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Winnebago County Property Tax Due Date

Illinois

(815) 319-4400

2026 Property Tax Due Dates

Official Source
Installment 1

Varies (Cook Co.: March 1)

First installment (varies by county)

Installment 2

Varies (Cook Co.: August 1)

Second installment

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Penalty: 1.5% per month starting day after dueGrace period: None

Payment Methods

Online, Mail, In-Person

Winnebago County Treasurer

How to Pay

Online

Pay using credit card or e-check

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By Mail

Mail check payable to Winnebago County Treasurer

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In Person

Visit the Treasurer's office

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Other Counties in Illinois

AdamsAlexanderBondBooneBrownBureauCalhounCarroll

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About Winnebago County

Winnebago County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 285,350 making it the seventh most populous county in Illinois behind Cook County and its five surrounding collar counties. Its county seat is Rockford.

Source: Wikipedia — content available under CC BY-SA 4.0

Related Resources

CountyRollCounty Office Directory

Find the assessor, treasurer & recorder for Winnebago

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Property Tax FAQTax Calendar

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Due dates shown are for reference only. Contact your county treasurer's office to confirm official deadlines before making payments.