South Dakota · FIPS 46127 · ACS 2020–2024
Union County, South Dakota property tax rate
Homeowners in Union County paid a median of $3,317 a year in real estate taxes on a median home value of $301,100 (2020–2024 survey). Taxes came to 1.12% of home value, 12% above the South Dakota rate of 1.00% and 19% above the U.S. rate of 0.94%.
- 1.12%Effective tax rate±0.12% margin · South Dakota: 1.00%
- $3,317Median tax per yearSouth Dakota: $2,724 · U.S.: $3,119
- $301,100Median home valueSouth Dakota: $257,400
- 5,343Owner-occupied homes73% of households own
| Measure | Union County | South Dakota | U.S. | Union County 2019–2023 | Change |
|---|---|---|---|---|---|
| Effective tax rate | 1.12% | 1.00% | 0.94% | 1.14% | −0.03 pts |
| Median tax, all owners | $3,317 | $2,724 | $3,119 | $2,997 | +$320 (+10.7%) |
| Median tax, with a mortgage | $3,343 | $2,955 | $3,489 | $3,026 | +$317 (+10.5%) |
| Median tax, no mortgage | $3,263 | $2,390 | $2,576 | $2,954 | +$309 (+10.5%) |
| Median home value | $301,100 | $257,400 | $332,700 | $269,500 | +$31,600 (+11.7%) |
| Total taxes paid | $20,500,100 | $761,479,200 | $360,573,527,500 | $18,540,700 |
How Union County compares
- Per $1,000 of home value, owners here paid about $11.18 a year, against $9.97 statewide and $9.40 nationally.
- Rank in South Dakota: 41 of 44 counties from lowest to highest effective rate (among those with reliable estimates). Nationally, 77% of 2,682 counties had a lower rate.
- Homes with a mortgage: 1.10% of value; homes without one: 1.14%. Median bills: $3,343 and $3,263.
- Compared with the 2019–2023 survey, the effective rate fell (−0.03 pts) and the median tax changed +$320 (+10.7%). The two 5-year surveys share four years of responses, so year-to-year moves are small and partly noise.
- Margin of error: the effective rate is 1.12% ± 0.12% at 90% confidence, from a sample of the 5,343 owner-occupied homes.
South Dakota counties with similar rates
| County | Effective rate | Median tax | Median value |
|---|---|---|---|
| Brown County | 1.07% | $2,598 | $221,100 |
| Bon Homme County | 1.10% | $1,707 | $134,100 |
| McPherson County | 1.10% | $1,323 | $85,600 |
| Brookings County | 1.11% | $2,981 | $264,600 |
| Walworth County | 1.12% | $1,792 | $136,600 |
| Lincoln County | 1.12% | $3,990 | $348,300 |
| Clay County | 1.13% | $2,937 | $232,300 |
| Davison County | 1.14% | $2,526 | $205,800 |
Sources
- U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table-based summary file: B25090 (aggregate real estate taxes), B25082 (aggregate home value), B25103 (median real estate taxes), B25077 (median home value) and B25003 (tenure); files dated January 29, 2026.
- U.S. Census Bureau, American Community Survey 2019–2023 5-year estimates, same tables (files dated October 31, 2024), for the comparison column.
- Geography names: Census Bureau Geos20245YR.txt (file dated January 22, 2026).
Effective rate = total real estate taxes paid by owner-occupied homes ÷ their total value, as reported by owners to the Census Bureau. It is not a millage rate. Your bill depends on your assessed value, exemptions (such as homestead) and local levies.