Gregory County, SD Property Tax: $1,419/yr (2026)
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The effective property tax rate in Gregory County is 1.10% of assessed home value. On a home at the county median value of $129,000, that works out to about $1,419 per year, or $118 per month. Gregory County is located in southern South Dakota, and is home to approximately 3,993 residents.
About Gregory County
Gregory County covers approximately 1,015.0 square miles in South Dakota. The county is home to about 3,993 residents living in roughly 2,199 housing units, of which 58.3% are owner-occupied. The median household income is $52,432, and the median home was built in 1960.
Gregory County borders Boyd County, Keya Paha County, Charles Mix County, Lyman County, Tripp County — useful comparisons if you're considering nearby areas with potentially different tax rates.
How Property Taxes Work in South Dakota
Property taxes in South Dakota 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 South Dakota 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 Gregory County Assessor's office to learn which exemptions apply to your property and when to file.
Gregory County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| Gregory County, SD | 1.10% | $129,000 | $1,419 |
| South Dakota state average | 1.09% | — | $1,406* |
| Boyd County | 1.22% | $104,000 | $1,268 |
| Keya Paha County | 1.14% | $108,800 | $1,240 |
| Charles Mix County | 1.08% | $169,200 | $1,823 |
| Lyman County | 1.01% | $156,500 | $1,581 |
| Tripp County | 0.90% | $137,100 | $1,237 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at Gregory County's median home value of $129,000. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does Gregory County's property tax rate compare to the rest of South Dakota?
At 1.10%, Gregory County is higher than the South Dakota state average of 1.09%. On a home at the county median of $129,000, that means about $1,419 per year — versus $1,406 at the state average rate, a difference of $13 per year. Compared to the national average of 1.10%, Gregory County is at average.
What's a typical annual property tax bill in Gregory County?
For a home at the county median value of $129,000, the annual property tax in Gregory County is approximately $1,419 — or about $118 per month. For a home worth $193,500, expect around $2,129 per year. For a $258,000 home, approximately $2,838 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a Gregory County property tax assessment?
Property assessment appeals in Gregory County are handled by the Gregory 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 Gregory County?
South Dakota 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 1.10% shown here. Contact the Gregory 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