Rock Island County, IL property tax deadlines
4 coming property tax dates for Rock Island County, Illinois. Each one links to its official source and shows the day LevyDay last checked it.
| Next dates | Bills due | Last day without penalty | Appeal by | Exemption filing |
|---|---|---|---|---|
| Rock Island | Nov 10, 2026rockislandcountyil.govOct 21 | Not on file | Set by noticeptab.illinois.govOct 21 | Not on file |
Deadlines in date order
| Date and source | Deadline |
|---|---|
| November 10, 2026 2026 onlyrockislandcountyil.govOct 21 | Bills due 2025 taxes, fourth installment |
| November 13, 2026 2026 onlyrockislandcountyil.govOct 21 | Other 2025 taxes, last day to pay online |
| Varies, see rule set by noticeptab.illinois.govOct 21 | Appeal deadline Appeal to the state Property Tax Appeal Board You have 30 days from the postmark on the board of review's written decision (or on the notice of final township multipliers). |
| Varies, see rule set by noticetax.illinois.govOct 21 | Bills due Two installments, set by the county Most counties bill in two installments, usually June 1 and September 1. If bills go out after May 1, the first installment is due 30 days after the bill date. Your county treasurer sets the real dates. |
Appealing your assessed value
Appeal by the date on your noticeptab.illinois.govOct 21
If you think the county valued your home too high, you can appeal. Filing with the county is free and you can do it yourself.
Get help filing an appeal
After you send your details, we look for an independent appeal firm or attorney to take your case. We'll be in touch once one has agreed. Firms usually charge a share of what you save, and the one that takes it may pay LevyDay a referral fee.
LevyDay doesn't file appeals or give legal or tax advice. We only pass your details on. The independent firm or attorney that takes your case does the work and sets its own fee.
Get help filing an appealAlready passed
- Jun 10, 2026 2025 taxes, first installment rockislandcountyil.govOct 21
- Aug 10, 2026 2025 taxes, second installment rockislandcountyil.govOct 21
- Sep 10, 2026 2025 taxes, third installment rockislandcountyil.govOct 21
Good to know in Illinois
- Paying late: If the taxes aren't redeemed, the certificate of tax purchase can be used to seek a tax deed to the property. More rockislandcountyil.govOct 21
- Appealing your value: Outside Cook County, you appeal your assessment to the county board of review. In Cook County, you can file with the county assessor or the county board of review. More ptab.illinois.govOct 21
- Homestead exemption: The General Homestead Exemption is for a home occupied by its owner as their principal dwelling place. It's worth up to $10,000 of assessed value in Cook County, $8,000 in counties next to Cook and $6,000 elsewhere. More tax.illinois.govOct 21
Places in Rock Island County
They are: Andalusia, Barstow, Buffalo Prairie, Campbell's Island, Carbon Cliff, Coal Valley, Cordova, Coyne Center, East Moline, Edgington, Hampton, Hillsdale, Illinois City, Joslin, Milan, Moline, Oak Grove, Port Byron, Rapids City, Reynolds, Rock Island, Rock Island Arsenal, Silvis, Taylor Ridge. Every place in the county gets the dates above.
Nearby in the Illinois list
PikePopePulaskiPutnamRandolphRichlandSt. ClairSalineSangamonSchuylerScottShelby