Union County property tax
Homeowners in Union County, South Dakota typically pay about 1.10% of their home's value in property tax each year — a median bill of $3,317 on a median home value of $301,100.
Typical effective rate
1.10%
higher than 29% of U.S. counties
Median tax paid
$3,317
per year
Median home value
$301,100
In SD
#23
of 66 ranked counties
At a glance
- Effective rate 1.10% — 18% higher than the U.S. median of 0.94%, and 4% higher than the South Dakota median of 1.06%.
- With vs. without a mortgage — median tax $3,343 for mortgaged homes, $3,263 for homes owned outright.
- State ranking — 23rd highest effective rate of 66 ranked South Dakota counties; nationally it sits around the 71th percentile.
Estimate a bill for Union County
Apply this county's typical effective rate (1.10%) to a home value of your choice.
Frequently asked questions
What is the property tax rate in Union County, SD?
The typical effective property-tax rate in Union County is 1.10% of a home's value per year, based on median taxes paid ($3,317) divided by the median home value ($301,100) in the Census ACS 2020–2024 5-year estimates. This is a typical burden for comparison, not a statutory mill rate.
How much is property tax on a typical home in Union County?
The median owner-occupied home in Union County is valued at $301,100, and the median real estate tax paid is $3,317 per year. Homes with a mortgage have a median tax of $3,343, versus $3,263 for homes without one.
How does Union County compare to the rest of South Dakota?
Union County's effective rate is 4% higher than the South Dakota median, ranking 23rd of 66 ranked counties in the state.
Compare nearby South Dakota counties
Counties ranked closest to Union County by in-state effective rate. Open the comparison tool or see all South Dakota counties.
| In-state | County | Effective rate | Median tax |
|---|---|---|---|
| 20 | Harding County | 1.12% | $1,863 |
| 21 | Hamlin County | 1.11% | $2,313 |
| 22 | Moody County | 1.10% | $2,500 |
| 24 | Charles Mix County | 1.10% | $1,878 |
| 25 | Hughes County | 1.10% | $2,659 |
| 26 | Beadle County | 1.09% | $1,900 |
Official data & resources for Union County
- Union County Census profile (data.census.gov) — housing, value and tax figures for this county.
- Table B25103 for Union County — median real estate taxes paid (the source for the tax figures above).
- Table B25077 for Union County — median home value.
- Federal forms & is property tax deductible? — IRS Pub 530, Schedule A and the SALT cap, plus your state tax agency.
Finding your exact bill
Your county or municipal assessor (sometimes called the appraisal district, property appraiser, or tax collector) sets the assessed value and the exact millage that produces your bill. Search for "[county name] [state] assessor" or "property tax" on an official .gov site.
Figures on this page are Census survey medians for the whole county (2020–2024 5-year), not an assessment of any individual property. Rates, exemptions and assessment practices vary by municipality and school district within a county.