Property tax in Mercer County, Ohio
The median property tax bill in Mercer County, Ohio is $2,325 a year, which is about 1.1% of the county's median home value of $210,600. That effective rate is higher than the typical Ohio county (1.05%) and higher than the national median (0.81%). These are American Community Survey 5-year estimates (2024); your own bill depends on your home's assessed value and any exemptions.
Estimate the property tax on a home in Mercer County
Enter a home's market value for a ballpark at Mercer County's average effective rate of 1.1% (Census). The real bill depends on the home's assessed value, the millage where it sits and any exemptions.
Estimated property tax: $2,317 / year
Property tax in Mercer County at a glance
| Measure | Value |
|---|---|
| Median annual property tax | $2,325 |
| Median home value | $210,600 |
| Effective tax rate | 1.1% |
| Typical Ohio county rate | 1.05% |
| National median county rate | 0.81% |
Effective rate = median real estate taxes paid divided by median home value. Source: U.S. Census Bureau, American Community Survey 5-year estimates.
How does Mercer County compare in Ohio?
Among Ohio's 88 counties, Mercer County has the 34th highest effective property-tax rate: 33 rank higher and 54 rank lower. That is on the higher side for Ohio. Nationally, it ranks 904th of 3135 US counties by effective rate. See every Ohio county ranked.
How much do homeowners in Mercer County actually pay?
The median is only the middle bill. Across Mercer County's 13,053 owner-occupied homes, 32.6% pay $3,000 or more a year in property tax, 56.6% pay at least $2,000, and 7.7% pay under $800. Another 2.4% report paying no property tax at all, which usually means an exemption covers the whole bill.
| Annual bill | Homes | Share |
|---|---|---|
| Under $800 | 1,009 | 7.7% |
| $800 to $1,499 | 2,331 | 17.9% |
| $1,500 to $1,999 | 2,007 | 15.4% |
| $2,000 to $2,999 | 3,135 | 24% |
| $3,000 or more | 4,252 | 32.6% |
| No property tax paid | 319 | 2.4% |
Owners with a mortgage pay a median of $2,303 and owners without one pay $2,351. That is within 10% either way, so in Mercer County paying off the house does not go with a noticeably different bill. Census table B25103.
How does the Mercer County property tax bill compare with local incomes?
The median property tax bill of $2,325 is about 2.6% of the median income of Mercer County homeowner households, $88,629 a year. That compares two middles, so a retiree in a long-held home can pay a far larger share. 79.6% of Mercer County's occupied homes are lived in by their owners; renters pay property tax too, just folded into rent.
Have property taxes gone up in Mercer County?
Yes. The median bill went from $1,756 in 2015-2019 to $2,325 in 2020-2024, a 32.4% rise. Over the same span the median home value moved 36.9%, from $153,800 to $210,600.
Two Census ACS 5-year periods with no survey years in common, in each period's own dollars. A change counts only if it exceeds the combined 90% margin of error.
Property tax in counties next to Mercer County
Mercer County borders 6 counties, 2 of them across the state line.
| County | Effective rate | Median bill | Median home value |
|---|---|---|---|
| Mercer County, OH (this county) | 1.1% | $2,325 | $210,600 |
| Auglaize County, OH | 0.96% | $1,828 | $189,800 |
| Shelby County, OH | 0.95% | $1,981 | $208,100 |
| Darke County, OH | 0.91% | $1,584 | $173,200 |
| Van Wert County, OH | 0.91% | $1,387 | $152,000 |
| Adams County, IN | 0.77% | $1,373 | $178,400 |
| Jay County, IN | 0.6% | $707 | $117,500 |
How is a home assessed in Mercer County?
Ohio assesses homes at 35% of market value in every county, Mercer County included. How Ohio assesses and reappraises homes.
Is there a homestead exemption in Mercer County?
No. Ohio has no universal homestead exemption; relief is targeted to seniors, the disabled and disabled veterans. That is the Ohio rule, and it applies in Mercer County. Ohio's exemptions and relief programs in full.
When are property taxes due in Mercer County?
Two semiannual installments (statutory dates: first half by December 31, second half by June 20), but county treasurers commonly extend these, so actual due dates vary by county, often late January-February and late June-July (ORC 323.12).
Ohio splits the bill into 2 installments. That is the Ohio rule. Mercer County issues and collects the bill, so the dates printed on your statement are the ones that bind you.
How to appeal your Mercer County property assessment
You contest the assessed value with the County Board of Revision. The filing deadline is typically March 31 of the following year. That is the Ohio rule; Mercer County sets the exact dates and forms. The Ohio appeal process step by step.
Ohio rules from primary state sources, reviewed September 7, 2026; sources on the Ohio page.
Work out your own numbers
-
How much house can I afford?
Your income, debts and down payment against the 28/36 rule lenders actually use, with Mercer County's tax rate to hand.
-
Mortgage calculator
Monthly payment with principal, interest, tax and insurance, plus what an extra payment saves you.
-
Ohio income tax
Brackets, standard deduction and what Ohio actually taxes.
-
Sales tax in Mercer County
The other local tax: combined state and local rate for this county.
Sources
- Median real estate taxes paid and median home value for Mercer County, Ohio: U.S. Census Bureau, American Community Survey 5-year estimates (2020-2024), tables B25103, B25077, B25102, B25119 and B25003; the five-year comparison uses the 2015-2019 estimates. Neighboring counties: Census county adjacency file.