Williams County, OH Property Tax: $1,624/yr (2026)
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The effective property tax rate in Williams County is 1.16% of assessed home value. On a home at the county median value of $140,000, that works out to about $1,624 per year, or $135 per month. Williams County is located in northwestern Ohio, and is home to approximately 36,862 residents.
About Williams County
Williams County covers approximately 420.7 square miles in Ohio. The county is home to about 36,862 residents living in roughly 16,574 housing units, of which 70.5% are owner-occupied. The median household income is $61,834, and the median home was built in 1966.
Williams County borders DeKalb County, Steuben County, Hillsdale County, Defiance County, Fulton County — useful comparisons if you're considering nearby areas with potentially different tax rates.
How Property Taxes Work in Ohio
Property taxes in Ohio 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 Ohio 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 Williams County Assessor's office to learn which exemptions apply to your property and when to file.
Williams County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| Williams County, OH | 1.16% | $140,000 | $1,624 |
| Ohio state average | 1.15% | — | $1,610* |
| DeKalb County | 0.63% | $177,900 | $1,117 |
| Steuben County | 0.58% | $204,300 | $1,188 |
| Hillsdale County | 0.96% | $170,500 | $1,644 |
| Defiance County | 1.12% | $150,900 | $1,686 |
| Fulton County | 1.33% | $176,000 | $2,348 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at Williams County's median home value of $140,000. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does Williams County's property tax rate compare to the rest of Ohio?
At 1.16%, Williams County is higher than the Ohio state average of 1.15%. On a home at the county median of $140,000, that means about $1,624 per year — versus $1,610 at the state average rate, a difference of $14 per year. Compared to the national average of 1.10%, Williams County is above average.
What's a typical annual property tax bill in Williams County?
For a home at the county median value of $140,000, the annual property tax in Williams County is approximately $1,624 — or about $135 per month. For a home worth $210,000, expect around $2,436 per year. For a $280,000 home, approximately $3,248 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a Williams County property tax assessment?
Property assessment appeals in Williams County are handled by the Williams 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 Williams County?
Ohio 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 1.16% shown here. Contact the Williams 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