Iowa County, WI Property Tax: $3,864/yr (2026)
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The effective property tax rate in Iowa County is 1.56% of assessed home value. On a home at the county median value of $248,100, that works out to about $3,870 per year, or $323 per month. Iowa County is located in southern Wisconsin, and is home to approximately 23,832 residents.
About Iowa County
Iowa County covers approximately 762.7 square miles in Wisconsin. The county is home to about 23,832 residents living in roughly 11,007 housing units, of which 69.7% are owner-occupied. The median household income is $83,372, and the median home was built in 1975.
Iowa County borders Dane County, Grant County, Green County, Lafayette County, Richland County — useful comparisons if you're considering nearby areas with potentially different tax rates.
How Property Taxes Work in Wisconsin
Property taxes in Wisconsin are administered at the county level. Each county sets a millage rate applied to the assessed value of real property — the effective rate above accounts for any partial assessments and exemptions already built into the local tax base. Assessed value can differ meaningfully from current market value depending on how often the county reassesses and what fraction of market value it uses.
Most counties in Wisconsin offer exemptions that reduce the taxable assessed value: homestead exemptions for primary residences, senior exemptions, disability exemptions, and veteran exemptions are common. These reduce your effective rate below the county-wide average shown here. Contact the Iowa County Assessor's office to learn which exemptions apply to your property and when to file.
Iowa County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| Iowa County, WI | 1.56% | $248,100 | $3,870 |
| Wisconsin state average | 1.44% | — | $3,573* |
| Dane County | 1.71% | $366,100 | $6,276 |
| Grant County | 1.44% | $186,300 | $2,683 |
| Green County | 1.64% | $236,900 | $3,882 |
| Lafayette County | 1.64% | $182,100 | $2,980 |
| Richland County | 1.41% | $182,800 | $2,579 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at Iowa County's median home value of $248,100. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does Iowa County's property tax rate compare to the rest of Wisconsin?
At 1.56%, Iowa County is higher than the Wisconsin state average of 1.44%. On a home at the county median of $248,100, that means about $3,870 per year — versus $3,573 at the state average rate, a difference of $297 per year. Compared to the national average of 1.10%, Iowa County is above average.
What's a typical annual property tax bill in Iowa County?
For a home at the county median value of $248,100, the annual property tax in Iowa County is approximately $3,870 — or about $323 per month. For a home worth $372,150, expect around $5,806 per year. For a $496,200 home, approximately $7,741 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a Iowa County property tax assessment?
Property assessment appeals in Iowa County are handled by the Iowa County Assessor's office. Most jurisdictions require filing within 30–90 days of receiving your assessment notice — confirm the specific deadline with the assessor's office before submitting, as deadlines and procedures vary by county. A successful appeal can reduce your assessed value and lower your tax bill for the current and future tax years.
What exemptions are available in Iowa County?
Wisconsin counties commonly offer homestead exemptions for owner-occupied primary residences, senior citizen exemptions for qualifying homeowners aged 65 and older, exemptions for disabled residents, and veterans' exemptions. Each exemption reduces your assessed taxable value, which in turn reduces your effective tax rate below the county-wide 1.56% shown here. Contact the Iowa County Assessor's office to confirm which exemptions are available and the application deadlines.
Data sources: US Census Bureau ACS 2023 5-Year Estimates, US Census Gazetteer (2024), County Adjacency File