Union County Property Taxes
Union County, Iowa
Effective Tax Rate
0.00%
2.4% below state avgMedian Annual Tax
$0
$176/mo escrow
Estimate Your Tax
Annual Tax
$0
Monthly
$0
Eff. Rate
1.79%
At a Glance
Median Home Value
$117,800
State avg ▼ $160,608
Tax w/ Mortgage/yr
$2,086
$174/mo escrow
Tax w/o Mortgage/yr
$2,123
$177/mo
State Tax Rate Rank
#98
of 99 counties (1 = lowest)
Data Story
About Property Taxes in Union County, Iowa
Union County has Iowa's highest tax rate
Union County's effective tax rate of 1.790% ranks among the highest in the nation, about 63% above the national median of 1.1%. The median property tax of $2,108 is 22% below the national median of $2,690, as lower home values offset the high rate.
Highest-taxed county in Iowa
Union County's 1.790% effective rate is the highest in Iowa, significantly exceeding the state average of 1.344%. At $2,108 in median taxes, it falls below the state median of $2,160 only because of unusually low home values in the county.
Union County stands out for high rates
Union County's 1.790% rate dwarfs all nearby counties—nearly double that of Sac County at 1.028% and substantially higher than even Story County's 1.472%. This represents the steepest property tax burden in the entire state.
What homeowners actually pay here
A homeowner with a $117,800 median-valued home in Union County pays approximately $2,108 annually in property taxes. That's about $176 per month—the highest rate in the state on a per-value basis.
Assessment appeals are especially critical
With Union County's exceptionally high tax rate, verifying your assessment's fairness is essential. Any overassessment will cost you significantly more here than elsewhere—making an appeal potentially worth substantial annual savings.
How Union County Compares
Median Annual Property Tax
Union County
1.79%
Effective rate
Iowa Avg
1.34%
Effective rate
National Avg
0.91%
Effective rate
Frequently Asked Questions
What is the property tax rate in Union County, Iowa?
How much are property taxes in Union County?
How does Union County compare to the Iowa average?
What is the median home value in Union County, Iowa?
Why is Union County property tax rate higher than the Iowa average?
How does Union County rank for property taxes in Iowa?
Counties with Similar Tax Rates
Nearby Counties
Other Counties in Iowa
Data updated: March 2026
Data from U.S. Census Bureau, American Community Survey 2019-2023 5-Year Estimates. Effective tax rate is calculated as median property tax divided by median home value.