Sales tax in Mercer County, Ohio
The sales tax rate in Mercer County, Ohio is 7.25%. That is a 5.75% state rate plus a 1.5% county rate, and it is the same at every address in the county. That rate was read from Ohio's own published schedule and checked on September 9, 2026.
What is the sales tax rate in Mercer County?
| Ohio state rate | 5.75% |
|---|---|
| Mercer County rate | 1.5% |
| Combined rate | 7.25% |
How much sales tax is that on a purchase in Mercer County?
At 7.25%, a $100 purchase carries $7.25 in sales tax and a $1,000 purchase $72.50. That is general merchandise; Ohio taxes some categories, often groceries, differently, as the note below explains.
Among Ohio's 88 counties, Mercer County's rate ranks 8th highest, level with 50 other counties. See every Ohio county.
Sales tax in counties next to Mercer County
Mercer County borders 6 counties, 2 of them in another state. The lowest rate next door is 7% in Adams County, IN, which is $2.50 less on a $1,000 purchase than Mercer County's rate.
| County | Combined sales tax |
|---|---|
| Auglaize County, OH | 7.25% |
| Darke County, OH | 7.25% |
| Shelby County, OH | 7.25% |
| Van Wert County, OH | 7.25% |
| Mercer County, OH (this county) | 7.25% |
| Adams County, IN | 7% |
| Jay County, IN | 7% |
Why the rate here is not the whole story
Ohio's state sales tax rate is 5.75 percent and Mercer County levies a permissive county sales tax of 1.5 percent, for a combined 7.25 percent that applies at every address in the county. Ohio cities and villages cannot levy a general sales tax of their own. No regional transit authority levies in Mercer County, so the county is the only body below the state that taxes here and the county line is the tax boundary. Ohio counties and regional transit authorities may raise their levies only in multiples of 0.05 percent, the combined state, county and transit rate may not exceed 8.75 percent, and a change can only take effect at the start of a calendar quarter.
How do I find the exact rate for an address in Mercer County?
Use Ohio's own address lookup.
Who has to collect sales tax in Mercer County?
Any seller with a physical presence in Ohio collects at the rate for the address of the sale; a remote seller does once it passes Ohio's economic nexus threshold. Ohio sales tax covers the statewide rules and what is exempt.
Work out your own numbers
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Sales tax calculator
Tax on a specific purchase at this county's rate, and the total you will actually pay.
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Do you have to collect?
Whether your sales into Ohio cross its economic nexus threshold. A different question from the rate.
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Property tax in Mercer County
The other local tax: effective rate and median bill for this county.
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Sales tax by county
Every US county, and how Ohio compares with the rest of the country.
Sources
- Mercer County rates: Ohio Department of Taxation, Sales and Use Tax Rates listed by county and transit authority, 2025 4th Quarter table effective October 1, 2025, https://tax.ohio.gov/wps/portal/gov/tax/business/sales-and-use-tax/rate-tables/by-county-q4-2025, still the rate in force on September 9, 2026 because the Department posted no county rate change for the 1st, 2nd or 3rd quarters of 2026. State, county permissive and transit components split using the Department's Streamlined Sales Tax rate file OHR2026Q1NOV28.csv and OHTransitFIPSCodes.txt, both downloaded from The Finder at https://thefinder.tax.ohio.gov, and cross checked against the Department's Ohio County Rate Table by Zip Code, CountySalesTaxRateReport.csv
- Collected and verified September 9, 2026. Confidence: P on the rate components, P on the range (P read on a primary agency page, S strong but indirect, U unverified).