Rock County, Wisconsin Property Taxes
Property Taxes in Rock County, Wisconsin
Median Rock County effective property tax rate: 1.16%, significantly higher than the national median of 1.02%.
Median Rock County home value: $118,600
Median annual Rock County tax bill: $3,257, higher than the national median property tax bill of $2,400.
How are property taxes in Rock County calculated?
Property taxes in Rock County 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.
Why are Rock County property taxes higher than the national median? The county’s effective property tax rate of 1.16% is above the national median of 1.02%, which helps explain the higher annual bill.
How does Rock County compare with Wisconsin? Rock County’s median tax bill of $3,257 is lower than the state median by $857, even though the county rate is still above the national median.
Understanding your county's property tax system, exemptions, and reduction opportunities can lead to significant savings. Whether you live in Rock County or another part of the county, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Rock County, Wisconsin Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
1.16%
Estimate Property Tax Bill
$1,376
$1,277
How Does the Rock County Property Tax Calculator Work?
Use this Rock County property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Rock County's median effective tax rate of 1.16% to generate your estimate.
Enter your property's estimated assessed value — the figure the assessor assigns for tax purposes, which is typically lower than market value after applicable exemptions. Our calculator uses the median effective rate for a more accurate estimate than the statutory millage rate alone.
Your actual bill may vary based on your specific exemptions, local school district levies, and any special assessment districts that apply to your property. Rock County's median tax rate is higher than Wisconsin's 1.43% state median tax rate, and the county's median property tax bill of $3,257 is $857 higher than the state median bill.
For a more precise estimate, scroll down to explore city and ZIP code-level tax rate trends across Rock County.
Property Tax Rates Across Rock County, Wisconsin
What Are Effective Property Tax Rates Across Rock County?
Local government entities set tax rates, which vary widely across Rock County. Each year, the county estimates its budget for public services and divides that total by the assessed value of all taxable property within its jurisdiction.
Below, compare Rock County's effective property tax rate to other counties in Wisconsin or the U.S. median of 1.02%.
Rock County's median effective rate stands at 1.16%, which is higher than the national median of 1.02%. Within Rock County, the highest rate is found in Clinton at 1.64%, while Afton has the lowest at 1.08%.
These variations reflect differences in local school district levies, special assessment districts assessments, and special district bonds — which compound the base county rate.
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 Rock County Tax Rate
1.16%
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 Wisconsin Tax Rate
1.43%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Rock County, Wisconsin
| City | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Afton | 1.01% | 1.05% | 1.08% | 1.14% | 1.17% |
| Beloit | 1.02% | 1.10% | 1.13% | 1.15% | 1.36% |
| Clinton | 1.36% | 1.51% | 1.64% | 1.72% | 1.79% |
| Edgerton | 1.14% | 1.25% | 1.32% | 1.45% | 1.49% |
| Evansville | 1.21% | 1.25% | 1.63% | 1.65% | 1.69% |
| Footville | 1.37% | 1.40% | 1.42% | 1.45% | 1.49% |
| Fort Atkinson | 1.09% | 1.11% | 1.13% | 1.15% | 1.20% |
| Orfordville | 1.04% | 1.12% | 1.49% | 1.53% | 1.55% |
| Albany | N/A | N/A | N/A | N/A | N/A |
| Avalon | N/A | N/A | N/A | N/A | N/A |
| Brodhead | N/A | N/A | N/A | N/A | N/A |
| Brooklyn | N/A | N/A | N/A | N/A | N/A |
| Darien | N/A | N/A | N/A | N/A | N/A |
| Delavan | N/A | N/A | N/A | N/A | N/A |
| Janesville | N/A | N/A | N/A | N/A | N/A |
| Milton | N/A | N/A | N/A | N/A | N/A |
| Sharon | N/A | N/A | N/A | N/A | N/A |
| Stoughton | N/A | N/A | N/A | N/A | N/A |
| Whitewater | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Assessment Values Across Rock County, Wisconsin
When examining property taxes in Rock County, 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 Rock 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 Rock 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 Rock County.
For example, the median tax bill in Rock County is $3,257, compared with the national median property tax bill of $2,400. Tax bills range significantly across the county, with Beloit at $1,853 and Evansville at $4,913. Evansville also has the highest median home price at $315,000.
Median Rock County Market Value
$118,600
Median Wisconsin Market Value
$237,700
Median United States Market Value
$235,294
Property Tax Assessment Values Across Rock County, Wisconsin
| City | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Afton | $90,440 | $140,950 | $178,400 | $206,050 | $236,000 |
| Beloit | $93,200 | $119,900 | $163,600 | $236,000 | $320,480 |
| Clinton | $102,540 | $162,300 | $225,800 | $304,900 | $409,020 |
| Edgerton | $103,050 | $186,300 | $268,700 | $377,475 | $484,950 |
| Evansville | $143,600 | $228,750 | $315,000 | $384,650 | $459,000 |
| Footville | $126,840 | $155,900 | $191,600 | $225,700 | $259,300 |
| Fort Atkinson | $41,700 | $235,100 | $307,400 | $469,100 | $586,120 |
| Orfordville | $20,960 | $153,200 | $200,000 | $286,800 | $365,220 |
| Albany | N/A | N/A | N/A | N/A | N/A |
| Avalon | N/A | N/A | N/A | N/A | N/A |
| Brodhead | N/A | N/A | N/A | N/A | N/A |
| Brooklyn | N/A | N/A | N/A | N/A | N/A |
| Darien | N/A | N/A | N/A | N/A | N/A |
| Delavan | N/A | N/A | N/A | N/A | N/A |
| Janesville | N/A | N/A | N/A | N/A | N/A |
| Milton | N/A | N/A | N/A | N/A | N/A |
| Sharon | N/A | N/A | N/A | N/A | N/A |
| Stoughton | N/A | N/A | N/A | N/A | N/A |
| Whitewater | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Bills Across Rock County, Wisconsin
Property tax bills in Rock County, Wisconsin are based on a home’s assessed value and the local tax rate set by taxing authorities. The assessed value is compared with the market value of the property, and the final bill reflects how that value is distributed across school districts, municipalities, and other local services. For homeowners, this means the amount owed can change when property values rise or when local budgets shift.
With a median home price of $118,600, tax bills can vary widely across the county. The 25th percentile tax bill is $2,129, while the 75th percentile is $4,550 and the 90th percentile reaches $6,012. That range shows how location and assessment differences can significantly affect what homeowners pay. In Rock County, the highest median tax bill is $4,913 in Evansville, while the lowest median tax bill is $1,853 in Beloit.
Median Rock County Tax Bill
$3,257
Median Wisconsin Tax Bill
$3,453
Median United States Tax Bill
$2,400
Property Tax Bills Across Rock County, Wisconsin
| City | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Afton | $1,108 | $1,487 | $1,956 | $2,379 | $2,812 |
| Beloit | $1,053 | $1,346 | $1,853 | $2,783 | $4,036 |
| Clinton | $2,098 | $2,882 | $3,876 | $5,156 | $6,777 |
| Edgerton | $1,405 | $2,542 | $3,728 | $5,104 | $6,469 |
| Evansville | $2,764 | $3,607 | $4,913 | $6,023 | $7,038 |
| Footville | $1,724 | $2,257 | $2,748 | $3,233 | $3,734 |
| Fort Atkinson | $2,200 | $2,916 | $4,050 | $5,554 | $7,007 |
| Orfordville | $1,901 | $2,417 | $3,066 | $4,313 | $5,422 |
| Albany | N/A | N/A | N/A | N/A | N/A |
| Avalon | N/A | N/A | N/A | N/A | N/A |
| Brodhead | N/A | N/A | N/A | N/A | N/A |
| Brooklyn | N/A | N/A | N/A | N/A | N/A |
| Darien | N/A | N/A | N/A | N/A | N/A |
| Delavan | N/A | N/A | N/A | N/A | N/A |
| Janesville | N/A | N/A | N/A | N/A | N/A |
| Milton | N/A | N/A | N/A | N/A | N/A |
| Sharon | N/A | N/A | N/A | N/A | N/A |
| Stoughton | N/A | N/A | N/A | N/A | N/A |
| Whitewater | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | May 20 |
Links | |
|---|---|
| Rock Tax Assessor | |
| Website | www.co.rock.wi.us |