Algonquin, Mchenry County, Illinois Property Taxes
Property Taxes in Algonquin, Illinois
Median Algonquin, Illinois effective property tax rate: 2.37%, significantly higher than the national median of 1.02%, and higher than the Illinois state median of 2.33%.
Median Algonquin, Illinois home value: $354,918
Median annual Algonquin, Illinois tax bill: $8,365, $5,965 higher than the national median property tax bill of $2,400.
How are property taxes in McHenry calculated?
Property taxes in Algonquin, 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 Algonquin's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Algonquin, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Algonquin, Mchenry County, Illinois Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
2.37%
Estimate Property Tax Bill
$8,412
$7,806
How Does the Algonquin Property Tax Calculator Work?
Use this Algonquin property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Algonquin's median effective tax rate of 2.37% — based on actual property records in McHenry County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local assessor uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Algonquin'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 Algonquin: rates range from 2.37% in 60102 to 2.37% in 60102, 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 Algonquin.
About Algonquin Property Taxes
About Property Taxes in Algonquin, McHenry, Illinois
Algonquin’s median effective property tax rate of 2.37% is higher than the Illinois state median of 2.33% and higher than the national median of 1.02%. This rate reflects the McHenry 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 Algonquin. Homeowners in the 60102 ZIP code carry a median effective rate of 2.37%, while those in the lowest ZIP also pay 2.37%. This spread is 0 percentage points across the same city, reflecting how school district boundaries and local assessment districts are drawn across McHenry County.
Algonquin 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 Algonquin, Mchenry 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 Algonquin'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 Algonquin Tax Rate
2.37%
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 Mchenry County Tax Rate
2.42%
Median Effective Illinois Tax Rate
2.33%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Algonquin, Mchenry County, Illinois
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 60102 | 2.14% | 2.27% | 2.37% | 2.45% | 2.51% |
Source: Ownwell
Property Tax Assessment Values Across Algonquin, Mchenry County, Illinois
When examining property taxes in Algonquin, 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 McHenry County assessment office 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 McHenry County are sent in the spring each year and 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.
For example, the median home price in Algonquin is $354,918, with tax bills ranging significantly across the county. 60102 has the highest median home price at $354,918.
Property Tax Assessment Values Across Algonquin, Mchenry County, Illinois
Source: Ownwell
$167,403
$458,643
$749,883
Median Algonquin Market Value
$354,918
Median Mchenry County Market Value
$297,576
Median Illinois Market Value
$227,888
Median United States Market Value
$235,294
Property Tax Assessment Values Across Algonquin, Mchenry County, Illinois
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 60102 | $224,658 | $279,099 | $354,918 | $430,386 | $512,578 |
Source: Ownwell
Property Tax Bills Across Algonquin, Mchenry County, Illinois
Property tax bills in Algonquin are based on the assessed value of a home, not the market price alone. Local taxing authorities set tax rates, and the bill is calculated by applying those rates to the assessed value after any exemptions are considered. For homeowners, that means a higher assessed value or a higher tax rate can lead to a larger bill.
In Algonquin, the median home price is $354,918, and the median property tax bill is $8,365 in ZIP code 60102. That is well above the national median property tax bill of $2,400, showing how much local taxes can affect housing costs. Bills vary across the city, with the 25th percentile at $6,407 and the 75th percentile at $10,192, while the 90th percentile reaches $12,185. For many homeowners, property taxes are one of the largest ongoing costs of owning a home, so understanding how the bill is determined can make a meaningful difference.
Median Algonquin Tax Bill
$8,365
Median Mchenry County Tax Bill
$7,056
Median Illinois Tax Bill
$5,277
Median United States Tax Bill
$2,400
Property Tax Bills Across Algonquin, Mchenry County, Illinois
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 60102 | $4,956 | $6,407 | $8,365 | $10,192 | $12,185 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | July 1 |
Links | |
|---|---|
| McHenry Tax Assessor | |
| Website | mchenryil.devnetwedge.com |