Rock Island County Property Tax Calculator
Locality estimate page for Rock Island County, Illinois. Use this county/locality rate for faster screening, then confirm parcel-specific details with your local tax authority.
County/Locality Effective Rate
2.28%
State Effective Rate
1.88%
Sample Annual Tax Difference
$1,700
Median Home Value (ACS)
$150,400
Median Annual Tax Bill (ACS)
$3,425
Owner-Occupied Households
43,002
The typical owner-occupied home in Rock Island County is valued at $150,400 with a median real estate tax bill of $3,425 per year — an effective rate of 2.28%. Both figures come from the same ACS release, so the ratio is an estimate rather than an aggregate of individual bills.
State Mortgage Context: Illinois
Some counties follow standard FHA limits while higher-cost counties may qualify for elevated FHA limits.
State Effective Tax Rate
1.88%
FHA 1-Unit Floor
$541,287
FHA 1-Unit Ceiling
$1,249,125
In Rock Island County, Illinois, the current county-level estimate is 2.28%, or approximately $9,120 annually on a $400,000 home.
How to Use This County Estimate
Step 1
Enter your property value and assessment assumptions.
Step 2
Apply exemptions that may reduce taxable value.
Step 3
Compare county/locality estimate against statewide fallback.
Rock Island County Property Tax Snapshot
Estimated effective rate: 2.28% · vs Illinois: 1.88% · vs national benchmark: 0.90%
| Home value | Estimated annual tax | Estimated monthly tax |
|---|---|---|
| $250,000 | $5,700 | $475 |
| $400,000 | $9,120 | $760 |
| $500,000 | $11,400 | $950 |
| $750,000 | $17,100 | $1,425 |
| $1,000,000 | $22,800 | $1,900 |
Compare Nearby Property Taxes
- Rock Island County2.28%
- Kane County2.26%
- Peoria County2.24%
- Will County2.24%
- Kankakee County2.21%
- McHenry County2.36%
- Kendall County2.37%
Source Transparency
Source: U.S. Census Bureau, ACS 5-Year Estimates (B25103 / B25077)
View sourceLast updated: August 2026
Estimates only. Confirm parcel-specific amounts with the official local taxing authority.
Need Statewide Context?
Visit Illinois mortgage snapshot or return to the national calculator hub.