Property Tax in McHenry County, Illinois
In McHenry County, Illinois, the typical homeowner pays $7,153 a year in property taxes on a home worth a median of $286,900. 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 McHenry County numbers mean
Read the two medians together: $7,153 is the middle tax bill among owner-occupied households in McHenry County, and $286,900 is the middle home value. Neither figure describes a specific property — together they describe the typical homeowner's situation in the county.
The derived effective rate for McHenry County is 2.49% (median tax ÷ median value). Treat it as an estimate for comparison only: it comes from survey medians of different households, not from the county's rate schedule.
The key figures for McHenry County
| Measure | McHenry County |
|---|---|
| Median real estate taxes paid per year | $7,153 |
| Median home value | $286,900 |
| Derived effective rate* | 2.49% |
| Equivalent monthly tax | $596 |
| Tax per $100,000 of value (derived) | $2,493 |
| Illustrative tax on a $400,000 home (derived rate) | $9,972 |
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.
McHenry County at a glance
- Median tax rank in Illinois: #5 of 102 counties
- Median home value rank in Illinois: #7 of 102
- Population rank in Illinois: #6 of 102 (311,366 residents)
- Population density rank: #7 of 102 (516 people per square mile)
- Land area rank in Illinois: #34 of 102 (603 sq mi, 1.1% of the combined county land area)
- Median tax as a monthly figure: $596; per $1,000 of home value: $2.49
How McHenry County compares
The median tax bill in McHenry County is about 38% higher than the state median ($5,189 for Illinois) and about 141% higher than the US median ($2,969 nationally). By median taxes paid, the county ranks #5 out of 102 Illinois counties with published Census data — 4 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. McHenry County's derived rate of 2.49% sits above the derived US figure of 0.98%.
Some extra context for McHenry County: the median bill works out to about $596 a month, and the derived rate equals roughly $2,493 of tax per $100,000 of home value. The county is home to 311,366 people — the #6 most populous county in Illinois, spread over 603 square miles, a density of about 516 people per square mile. Its median home value, $286,900, ranks #7 among the state's 102 counties with data.
Zooming out: of 3133 counties nationwide with published Census figures, only 41 record a higher median tax bill than McHenry County — it sits in the top 1% nationally. The county holds roughly 2.5% of Illinois's people. Its homes are worth more than the state norm (median $286,900 versus $250,500), and a decade at the derived rate of 2.49% adds up to about 24.93% of the median home's value in tax. The cheapest county in the state, Pulaski County, medians $668 — $6,485 less than McHenry County per year.
Counties nearest McHenry County in the Illinois ranking
| County | Median tax paid | Median home value | Derived rate* |
|---|---|---|---|
| Kendall County, IL | $7,556 | $298,900 | 2.53% |
| Kane County, IL | $7,230 | $303,000 | 2.39% |
| Will County, IL | $6,993 | $298,000 | 2.35% |
| Cook County, IL | $6,053 | $305,200 | 1.98% |
How the tax is worked out
The bill is built in stages. First the assessor puts a market value on the property. Exemptions — a homestead exemption above all — then reduce the taxable amount. Finally the combined local rate is applied. To see the scale: at the county's derived rate of 2.49%, each $100,000 of value corresponds to about $2,493 of tax a year, and a $400,000 home to roughly $9,972. Real bills use the official assessment and district rates, not this derived figure, so treat the example as a sense of scale only.
Checking your assessment in McHenry County
Believe your assessment is too high? The practical order of attack is: obtain your record card and audit it line by line; collect comparable recent sales in McHenry County; ask the assessor's office to correct anything plainly wrong; and, if the value still seems off, lodge a formal appeal ahead of the deadline printed on your assessment notice. Windows are short — often 30 to 90 days — and late appeals are usually rejected outright, however strong the case.
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Frequently asked questions
What is the median property tax in McHenry County, Illinois?
The median real estate tax paid in McHenry County, Illinois is $7,153 per year, on a median home value of $286,900 (US Census Bureau, American Community Survey (ACS) 5-year estimates, 2023).
What is the effective property tax rate in McHenry County, Illinois?
Dividing McHenry County's median tax bill ($7,153) by its median home value ($286,900) gives a derived effective rate of 2.49%. This is an estimate computed from two Census survey medians — it is not the county's official tax rate.
How does McHenry County compare with the rest of Illinois?
By median taxes paid, McHenry County stands at #5 among the 102 Illinois counties the Census publishes figures for. Its $7,153 median bill is about 38% higher than the state median ($5,189), and 4 counties in the state record a higher median.
How are property taxes calculated in McHenry County, Illinois?
The assessor estimates your property's market value; exemptions (such as a homestead exemption) reduce the taxable amount; and the result is multiplied by the combined rates of the local taxing districts — county, municipality, school district and any special districts. In McHenry County, the median outcome of that process is a bill of $7,153 on a median home value of $286,900.
Can I appeal my property tax assessment in McHenry County, Illinois?
You can. Pull your property record card from the McHenry County assessor, verify its details, and compare the assessed value against similar homes that sold recently. If the value still seems too high, submit a formal appeal to the board named on your notice before the stated deadline — usually a 30-to-90-day window.