Property Tax in Kane County, Illinois
In Kane County, Illinois, the typical homeowner pays $7,230 a year in property taxes on a home worth a median of $303,000. The figures on this page are the Census Bureau's published medians (US Census Bureau, American Community Survey (ACS) 5-year estimates, 2023), shown exactly as released.
What the Kane County numbers mean
The median is the midpoint of the county's actual bills: half of Kane County homeowners pay more than $7,230 a year and half pay less. The exact bill for any one home depends on its assessed value, exemptions, and which school, municipal and special districts cover it.
Set against the median home value of $303,000, the median bill works out to a derived effective rate of 2.39%. That rate is an estimate computed from the two medians — no county publishes a rate calculated this way — but it adjusts for home prices, which makes comparisons between counties more meaningful.
The key figures for Kane County
| Measure | Kane County |
|---|---|
| Median real estate taxes paid per year | $7,230 |
| Median home value | $303,000 |
| Derived effective rate* | 2.39% |
| Equivalent monthly tax | $602 |
| Tax per $100,000 of value (derived) | $2,386 |
| Illustrative tax on a $400,000 home (derived rate) | $9,544 |
For context, the Illinois medians are $5,189 of tax on $250,500 of value, and the US medians are $2,969 on $303,400. *Derived figures are estimates from Census medians, not official rates.
Kane County at a glance
- Median tax rank in Illinois: #4 of 102 counties
- Median home value rank in Illinois: #4 of 102
- Population rank in Illinois: #5 of 102 (516,097 residents)
- Population density rank: #4 of 102 (994 people per square mile)
- Land area rank in Illinois: #50 of 102 (519 sq mi, 0.9% of the combined county land area)
- Median tax as a monthly figure: $602; per $1,000 of home value: $2.39
How Kane County compares
The median tax bill in Kane County is about 39% higher than the state median ($5,189 for Illinois) and about 144% higher than the US median ($2,969 nationally). By median taxes paid, the county ranks #4 out of 102 Illinois counties with published Census data — 3 counties in the state have a higher median bill.
Comparisons cut both ways: a county can have a modest rate but high bills because homes are expensive, or a high rate but modest bills because homes are cheaper. Kane County's derived rate of 2.39% sits above the derived US figure of 0.98%.
Some extra context for Kane County: the median bill works out to about $602 a month, and the derived rate equals roughly $2,386 of tax per $100,000 of home value. The county is home to 516,097 people — the #5 most populous county in Illinois, spread over 519 square miles, a density of about 994 people per square mile. Its median home value, $303,000, ranks #4 among the state's 102 counties with data.
Nationally, Kane County's median bill of $7,230 ranks #40 of 3133 counties with published data — inside the top 1% of counties by tax paid. The county accounts for about 4.1% of Illinois's population, its median home value is about 21% above the state median, and at the derived rate the median home would hand over roughly 23.86% of its value in tax across a decade. Within the state, the distance from Kane County to the most expensive county, Lake County ($8,743), is $1,513 a year.
Counties nearest Kane County in the Illinois ranking
| County | Median tax paid | Median home value | Derived rate* |
|---|---|---|---|
| DuPage County, IL | $7,833 | $374,100 | 2.09% |
| Kendall County, IL | $7,556 | $298,900 | 2.53% |
| McHenry County, IL | $7,153 | $286,900 | 2.49% |
| Will County, IL | $6,993 | $298,000 | 2.35% |
How the tax is worked out
As an illustration of the arithmetic: at Kane County's derived rate of 2.39%, a home valued at $400,000 would carry a tax bill of roughly $9,544 a year. That is only an illustration using the derived rate — a real bill is computed from the property's assessed value, its exemptions, and the combined rates of its specific taxing districts, so it can be higher or lower.
The usual sequence is: the local assessor values the property; exemptions are applied; the taxable value is multiplied by the combined local rates; and the county bills and collects the tax, distributing it to the schools, municipalities and districts that levied it.
Checking your assessment in Kane County
If your bill looks wrong, work through these steps:
1. Get your property record card from the assessor and check the basics — living area, lot size, bedrooms, condition, and any exemptions you should have.
2. Compare your assessed value with recent sale prices of similar homes in Kane County.
3. Talk to the assessor's office informally first; clear errors are often fixed without a hearing.
4. If needed, file a formal appeal with the local review board before the deadline on your assessment notice, with your evidence attached.
5. Keep paying the bill as issued while the appeal runs, unless your notice says otherwise — unpaid taxes accrue penalties regardless of an appeal.
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Frequently asked questions
What is the median property tax in Kane County, Illinois?
The median real estate tax paid in Kane County, Illinois is $7,230 per year, on a median home value of $303,000 (US Census Bureau, American Community Survey (ACS) 5-year estimates, 2023).
What is the effective property tax rate in Kane County, Illinois?
On a derived basis, 2.39%: the county's median tax bill of $7,230 divided by its median home value of $303,000. Because it is calculated from two survey medians, read it as a comparison estimate rather than an official rate.
How does Kane County compare with the rest of Illinois?
By median taxes paid, Kane County stands at #4 among the 102 Illinois counties the Census publishes figures for. Its $7,230 median bill is about 39% higher than the state median ($5,189), and 3 counties in the state record a higher median.
How are property taxes calculated in Kane County, Illinois?
Three steps produce the bill: an assessment of market value by the local assessor, a reduction for exemptions you qualify for (a homestead exemption is the common one), and multiplication by the combined rates of the county, municipality, school district and any special districts covering the property. The median result in Kane County is $7,230 of tax on a $303,000 median home value.
Can I appeal my property tax assessment in Kane County, Illinois?
Yes — appeals are handled locally. Start with the Kane County assessor's property record card for your home, correct any factual errors, and back your case with comparable recent sales. Formal appeals go to the review board named on your assessment notice and must be filed by its deadline, typically within 30 to 90 days.