Oldham County, KY Property Tax: $3,454/yr (2026)
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The effective property tax rate in Oldham County is 0.92% of assessed home value. On a home at the county median value of $375,000, that works out to about $3,450 per year, or $288 per month. Oldham County is located in northern Kentucky, and is home to approximately 68,600 residents.
About Oldham County
Oldham County covers approximately 187.3 square miles in Kentucky. The county is home to about 68,600 residents living in roughly 23,512 housing units, of which 84.1% are owner-occupied. The median household income is $121,491, and the median home was built in 1993.
Oldham County borders Clark County, Henry County, Jefferson County, Shelby County, Trimble County — useful comparisons if you're considering nearby areas with potentially different tax rates.
How Property Taxes Work in Kentucky
Property taxes in Kentucky 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 Kentucky 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 Oldham County Assessor's office to learn which exemptions apply to your property and when to file.
Oldham County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| Oldham County, KY | 0.92% | $375,000 | $3,450 |
| Kentucky state average | 0.72% | — | $2,700* |
| Clark County | 0.74% | $212,400 | $1,566 |
| Henry County | 0.82% | $181,300 | $1,489 |
| Jefferson County | 0.85% | $237,200 | $2,023 |
| Shelby County | 0.81% | $277,500 | $2,248 |
| Trimble County | 0.68% | $172,700 | $1,175 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at Oldham County's median home value of $375,000. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does Oldham County's property tax rate compare to the rest of Kentucky?
At 0.92%, Oldham County is higher than the Kentucky state average of 0.72%. On a home at the county median of $375,000, that means about $3,450 per year — versus $2,700 at the state average rate, a difference of $750 per year. Compared to the national average of 1.10%, Oldham County is below average.
What's a typical annual property tax bill in Oldham County?
For a home at the county median value of $375,000, the annual property tax in Oldham County is approximately $3,450 — or about $288 per month. For a home worth $562,500, expect around $5,175 per year. For a $750,000 home, approximately $6,900 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a Oldham County property tax assessment?
Property assessment appeals in Oldham County are handled by the Oldham 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 Oldham County?
Kentucky 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 0.92% shown here. Contact the Oldham 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