South Wilmington, Grundy County, Illinois Property Taxes
Property Taxes in South Wilmington, Illinois
Median South Wilmington, Illinois effective property tax rate: 2.86%, significantly higher than the national median of 1.02%, and higher than the Illinois state median of 2.33%.
Median South Wilmington, Illinois home value: $98,460
Median annual South Wilmington, Illinois tax bill: $2,814, $414 higher than the national median property tax bill of $2,400.
How are property taxes in Grundy calculated?
Property taxes in South Wilmington, Illinois are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding South Wilmington's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in South Wilmington, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
South Wilmington, Grundy County, Illinois Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
2.86%
Estimate Property Tax Bill
$2,816
$2,613
How Does the South Wilmington Property Tax Calculator Work?
Use this South Wilmington property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies South Wilmington's median effective tax rate of 2.86% — based on actual property records in Grundy County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local appraisal district uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies South Wilmington's median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.
Your bill may vary by ZIP code within South Wilmington: rates range from 2.86% in 60474 to 2.86% in 60474, primarily due to differences in school district levies and local assessment districts.
For a more precise estimate, scroll down to explore ZIP code-level tax rate trends across South Wilmington.
About South Wilmington Property Taxes
About Property Taxes in South Wilmington, Grundy, Illinois
South Wilmington’s median effective property tax rate of 2.86% is higher than the Illinois state median of 2.33% and higher than the national median of 1.02%. This rate reflects the Grundy County base levy combined with local school district levies and Special service areas (SSAs) that vary by subdivision throughout the city.
Property tax rates are not uniform across South Wilmington. Homeowners in the 60474 ZIP code carry a median effective rate of 2.86%, while those in 60474 pay 2.86%. This spread — 0 percentage points across the same city — reflects how school district boundaries and local assessment districts are drawn across Grundy County. Understanding which part of South Wilmington you live in can make a meaningful difference to your annual tax bill.
South Wilmington homeowners who believe their assessed value is too high can file a formal appeal with the local Tax Assessor before the June 1, 2026 deadline each year.
If your estimated bill above seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.
Property Tax Rates Across South Wilmington, Grundy County, Illinois
As noted earlier, local government entities set tax rates, which can vary widely within a state.
Why? Because annually, each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate.
While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.
Below, you can compare South Wilmington's effective property tax rate to other cities in Illinois and the median property tax rates in Illinois and the U.S.
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective South Wilmington Tax Rate
2.86%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Grundy County Tax Rate
2.61%
Median Effective Illinois Tax Rate
2.33%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across South Wilmington, Grundy County, Illinois
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 60474 | 2.83% | 2.86% | 2.86% | 2.86% | 2.86% |
Source: Ownwell
Property Tax Assessment Values Across South Wilmington, Grundy County, Illinois
When examining property taxes in South Wilmington, Illinois, understanding the distinction between "market value" and "assessed value" is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The Grundy County appraisal district estimates the market value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices:
In Grundy County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of the month.
Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in South Wilmington.
For example, the median home price in South Wilmington is $98,460, with tax bills ranging significantly across the county. 60474 has the highest median home price at $98,460.
Property Tax Assessment Values Across South Wilmington, Grundy County, Illinois
Source: Ownwell
$25,910
$191,346
$356,782
Median South Wilmington Market Value
$98,460
Median Grundy County Market Value
$179,043
Median Illinois Market Value
$227,888
Median United States Market Value
$235,294
Property Tax Assessment Values Across South Wilmington, Grundy County, Illinois
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 60474 | $26,301 | $44,460 | $98,460 | $142,367 | $215,195 |
Source: Ownwell
Property Tax Bills Across South Wilmington, Grundy County, Illinois
Property tax bills in South Wilmington are calculated by applying the local tax rate to a home’s assessed value, which is based on the market value of the property. Local taxing authorities set the rate, and the final bill reflects the value assigned to the home, any exemptions the owner qualifies for, and the needs of schools, counties, and other public services.
With a median home price of $98,460, homeowners in South Wilmington often see tax bills that can vary widely depending on assessment and local rates. The 25th percentile tax bill is $1,271, while the 75th percentile is $4,069 and the 90th percentile reaches $6,126. The median tax bill is $2,814, which is above the national median property tax bill of $2,400.
For homeowners, this means property taxes can be a significant part of housing costs, especially when assessed values rise faster than expected.
Median South Wilmington Tax Bill
$2,814
Median Grundy County Tax Bill
$4,909
Median Illinois Tax Bill
$5,277
Median United States Tax Bill
$2,400
Property Tax Bills Across South Wilmington, Grundy County, Illinois
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 60474 | $752 | $1,271 | $2,814 | $4,069 | $6,126 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | July 1 |
Links | |
|---|---|
| Grundy Tax Assessor | |
| Website | tax.grundyco.org |