Harmon County, OK Property Tax: $528/yr (2026)
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The effective property tax rate in Harmon County is 0.70% of assessed home value. On a home at the county median value of $75,700, that works out to about $530 per year, or $44 per month. Harmon County is located in western Oklahoma, with Hollis as its county seat, and is home to approximately 2,452 residents.
About Harmon County
Harmon County covers approximately 537.3 square miles in Oklahoma. The county is home to about 2,452 residents living in roughly 1,358 housing units, of which 50.4% are owner-occupied. The median household income is $54,286, and the median home was built in 1965.
The county seat is Hollis. Harmon County borders Beckham County, Greer County, Jackson County, Childress County, Collingsworth County — useful comparisons if you're considering nearby areas with potentially different tax rates.
How Property Taxes Work in Oklahoma
Property taxes in Oklahoma 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 Oklahoma 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 Harmon County Assessor's office to learn which exemptions apply to your property and when to file.
Harmon County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| Harmon County, OK | 0.70% | $75,700 | $530 |
| Oklahoma state average | 0.65% | — | $492* |
| Beckham County | 0.79% | $153,400 | $1,215 |
| Greer County | 0.57% | $103,600 | $590 |
| Jackson County | 0.63% | $145,000 | $918 |
| Childress County | 1.47% | $115,100 | $1,694 |
| Collingsworth County | 1.27% | $108,400 | $1,378 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at Harmon County's median home value of $75,700. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does Harmon County's property tax rate compare to the rest of Oklahoma?
At 0.70%, Harmon County is higher than the Oklahoma state average of 0.65%. On a home at the county median of $75,700, that means about $530 per year — versus $492 at the state average rate, a difference of $38 per year. Compared to the national average of 1.10%, Harmon County is below average.
What's a typical annual property tax bill in Harmon County?
For a home at the county median value of $75,700, the annual property tax in Harmon County is approximately $530 — or about $44 per month. For a home worth $113,550, expect around $795 per year. For a $151,400 home, approximately $1,060 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a Harmon County property tax assessment?
Property assessment appeals in Harmon County are handled by the Harmon County Assessor's office in Hollis. 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 Harmon County?
Oklahoma 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 0.70% shown here. Contact the Harmon 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