Union County Property Taxes
Union County, South Dakota
Effective Tax Rate
0.00%
67.9% above state avgMedian Annual Tax
$0
$250/mo escrow
Estimate Your Tax
Annual Tax
$0
Monthly
$0
Eff. Rate
1.11%
At a Glance
Median Home Value
$269,500
State avg ▲ $166,971
Tax w/ Mortgage/yr
$3,026
$252/mo escrow
Tax w/o Mortgage/yr
$2,954
$246/mo
State Tax Rate Rank
#39
of 65 counties (1 = lowest)
Data Story
About Property Taxes in Union County, South Dakota
Union's rate just below national median
Union County's 1.112% effective rate sits slightly below the national median of 1.56%, placing it in the nation's below-average tax tier. Despite this favorable rate, Union's median property tax of $2,997 exceeds the national median of $2,690 due to significantly higher home values.
Union slightly above state average rate
Union's 1.112% rate runs just 1.6% above South Dakota's state average of 1.094%, making it nearly representative of statewide conditions. However, Union's median tax of $2,997 substantially exceeds the state average of $1,785, driven entirely by Union's median home value of $269,500—the highest in the region.
Union's higher values drive tax bills
Union's 1.112% rate matches or beats most neighboring counties, but its median tax of $2,997 towers over peers like Spink ($1,539), Stanley ($2,423), and Turner ($2,072). Union's premium property values, not its tax rate, explain why residents pay more than neighbors despite moderate effective rates.
Union median home: $2,997 yearly tax
Union County's median home valued at $269,500 generates $2,997 in annual property taxes—the region's highest absolute tax bill. With mortgage considerations, total tax obligation reaches $3,026, reflecting Union's status as the region's most expensive housing market.
High-value properties warrant appeals
Union County homeowners with expensive properties face substantial annual tax bills and stand to save the most from successful assessment appeals. In a high-value market like Union, even minor percentage reductions in assessed value translate to thousands in cumulative tax savings.
How Union County Compares
Median Annual Property Tax
Union County
1.11%
Effective rate
South Dakota Avg
1.07%
Effective rate
National Avg
0.91%
Effective rate
Frequently Asked Questions
What is the property tax rate in Union County, South Dakota?
How much are property taxes in Union County?
How does Union County compare to the South Dakota average?
What is the median home value in Union County, South Dakota?
Why is Union County property tax rate higher than the South Dakota average?
How does Union County rank for property taxes in South Dakota?
Counties with Similar Tax Rates
Nearby Counties
Other Counties in South Dakota
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.