Big Rock, Dekalb County, Illinois Property Taxes
Median BIG ROCK, IL effective property tax rate: 2.41%, significantly higher than the national median of 1.02%, but lower than the Illinois state median of 2.35%.
Median BIG ROCK, IL home value: $302,934
Median annual BIG ROCK, IL tax bill: $6,558, $4,158 higher than the national median property tax bill of $2,400.
How are property taxes in DeKalb calculated?
Property taxes in BIG ROCK, IL 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 BIG ROCK’s property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in BIG ROCK, knowing local tax details benefits homeowners and investors.
Last Updated March 1, 2025
Big Rock, Dekalb County, Illinois Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
2.41%
Estimate Property Tax Bill
$7,301
$6,775
Property Tax Rates Across Big Rock, Dekalb County, Illinois
Local government entities set tax rates, and these can vary widely within Illinois. Each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction, resulting in the property tax rate. While votes and laws play a role in setting tax rates and budgets, this is essentially the annual process.
In Big Rock, located in DeKalb County, the effective property tax rate is 2.41%. This rate is notably higher than the national median property tax rate of 1.02%. When compared to other cities in Illinois, Big Rock's rate is among the highest. The median property tax rate for Illinois as a whole also stands at 2.41%, indicating that Big Rock aligns with the state average but still surpasses the national median.
Understanding these rates can help property owners in Big Rock make informed financial decisions. With property taxes being a significant expense, knowing how your city's rate compares to state and national averages is crucial for effective financial planning.
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 Big Rock Taxx Rate
2.41%
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 Dekalb County Taxx Rate
2.86%
Median Effective Illinois Tax Rate
2.35%
Median Effective United States Tax Rate
0.99%
Property Tax Rates Across Big Rock, Dekalb County, Illinois
Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
60511 | 1.98% | 2.33% | 2.41% | 2.63% | 2.80% |
Source: Ownwell
Property Tax Assessment Values Across Big Rock, Dekalb County, Illinois
When examining property taxes in Big Rock, IL, 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 DeKalb 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.
In DeKalb County, assessment notices are sent in the spring each year. They’ll typically reach your mailbox by the middle of May. 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 Big Rock. For example, the median home price in Big Rock is $302,934, with tax bills ranging significantly across the county. Zip code 60511 has the highest median home price at $302,934.
Property Tax Assessment Values Across Big Rock, Dekalb County, Illinois
Source: Ownwell

$145,544
$224,239
$302,934
Median Big Rock Market Value
$302,934
Median Dekalb County Market Value
$185,016
Median Illinois Market Value
$194,700
Median United States Market Value
$244,900
Property Tax Assessment Values Across Big Rock, Dekalb County, Illinois
Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
60511 | $234,769 | $273,687 | $302,934 | $337,134 | $439,709 |
Source: Ownwell
Property Tax Bills Across Big Rock, Dekalb County, Illinois
Median Big Rock Tax Bill
$6,558
Median Dekalb County Tax Bill
$5,206
Median Illinois Tax Bill
$4,715
Median United States Tax Bill
$2,690
Property Tax Bills Across Big Rock, Dekalb County, Illinois
Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
60511 | $5,368 | $6,073 | $6,558 | $8,530 | $11,713 |
Source: Ownwell