Dupo, St. Clair County, Illinois Property Taxes
Property Taxes in Dupo, Illinois
Median Dupo, Illinois effective property tax rate: 2.83%, significantly higher than the national median of 1.02%, and higher than the Illinois state median of 2.33%.
Median Dupo, Illinois home value: $100,512
Median annual Dupo, Illinois tax bill: $2,665, $265 higher than the national median property tax bill of $2,400.
How are property taxes in St. Clair calculated?
Property taxes in Dupo, 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 Dupo's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Dupo, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Dupo, St. Clair County, Illinois Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
2.83%
Estimate Property Tax Bill
$2,844
$2,640
How Does the Dupo Property Tax Calculator Work?
Use this Dupo property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Dupon's median effective tax rate of 2.83% — based on actual property records in St. Clair County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local assessment 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 Dupon'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 Dupon: rates range from 2.83% in 62239 to 2.83% in 62239, 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 Dupon.
About Dupo Property Taxes
About Property Taxes in DuPO, St. Clair, Illinois
DuPO’s median effective property tax rate of 2.83% is higher than the Illinois state median of 2.33% and higher than the national median of 1.02%. This rate reflects the St. Clair County base levy combined with local school district levies and special service areas that vary by subdivision throughout the city.
Property tax rates are not uniform across DuPO. Homeowners in ZIP code 62239 carry a median effective rate of 2.83%, while those in 62239 pay 2.83%. This spread reflects how school district boundaries and local assessment districts are drawn across St. Clair County. Understanding which part of DuPO you live in can make a meaningful difference to your annual tax bill.
DuPO homeowners who believe their assessed value is too high can file a formal appeal with the Tax Assessor before the June 1, 2026 deadline each year.
If your estimated bill 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 Dupo, St. Clair 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 Dupo'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 Ă· 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 Dupo Tax Rate
2.83%
Our median effective property tax rate (tax bill Ă· 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 St. Clair County Tax Rate
2.51%
Median Effective Illinois Tax Rate
2.33%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Dupo, St. Clair County, Illinois
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 62239 | 1.72% | 2.43% | 2.83% | 3.22% | 3.23% |
Source: Ownwell
Property Tax Assessment Values Across Dupo, St. Clair County, Illinois
When examining property taxes in Dupo, 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 St. Clair County assessor 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 St. Clair County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of the season.
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 Dupo.
For example, the median home price in Dupo is $100,512, with tax bills ranging significantly across the county. 62239 has the highest median home price at $100,512.
Property Tax Assessment Values Across Dupo, St. Clair County, Illinois
Source: Ownwell
$18,168
$156,686
$295,204
Median Dupo Market Value
$100,512
Median St. Clair County Market Value
$123,447
Median Illinois Market Value
$227,888
Median United States Market Value
$235,294
Property Tax Assessment Values Across Dupo, St. Clair County, Illinois
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 62239 | $27,729 | $66,657 | $100,512 | $145,984 | $172,714 |
Source: Ownwell
Property Tax Bills Across Dupo, St. Clair County, Illinois
Property tax bills in DuPo are based on the assessed value of a home, not its market price. Local tax rates are applied to that assessment to determine the final bill, so two homes with similar market values can still owe different amounts if their assessed values differ. Factors such as property characteristics, location, and local taxing jurisdictions all play a role in the calculation.
For homeowners, this means a property tax bill can change when a home is reassessed or when local rates shift. In DuPo, the median home price is $100,512, and the median property tax bill is $2,665, which is above the national median property tax bill of $2,400. Bills in the area also vary widely, with the 25th percentile at $1,526 and the 75th percentile at $4,014. That spread shows how much property taxes can differ from one homeowner to another.
Median Dupo Tax Bill
$2,665
Median St. Clair County Tax Bill
$2,978
Median Illinois Tax Bill
$5,277
Median United States Tax Bill
$2,400
Property Tax Bills Across Dupo, St. Clair County, Illinois
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 62239 | $640 | $1,526 | $2,665 | $4,014 | $4,923 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | July 1 |
Links | |
|---|---|
| St. Clair Tax Assessor | |
| Website | stclairil.devnetwedge.com |