Mercer County, Ohio Sales Tax Rate
Buying anywhere in Mercer County? The combined sales tax rate is 7.25%. Below is the full breakdown and a calculator already set to Mercer County.
Mercer County Rate Breakdown
Bordering County Savings Radar
How Mercer's 7.25% rate compares on a $100.00 purchase across county lines
Retail Purchases
Under R.C. 5739.033(B)(1), sales made by Ohio vendors are origin-sourced to where the order is received. Out-of-state remote sellers shipping to Mercer County charge this 7.25% destination rate.
Vehicle Titling
Under R.C. 4505.06, motor vehicles are taxed strictly by your county of residence at titling. On a $30,000 vehicle, Mercer County residents owe $2,175.00.
Groceries & Medicine
Unprepared food for human consumption and prescription drugs are 100% exempt ($0 tax) statewide in Mercer County under the Ohio Constitution (Art. XII, § 13), R.C. 5739.02(B)(2) (food), and R.C. 5739.02(B)(18) (prescription drugs).
Mercer County's 7.25% rate sits above the statewide average of 7.14%. Across Ohio, combined rates run from 6.50% to 8.00%. Compare all 88 Ohio county rates side by side.
Anywhere in Mercer County, a taxable purchase adds 1.50% in county and transit tax on top of Ohio's 5.75% state base — the 7.25% combined rate shown above. 50 of Ohio's 88 counties charge this exact rate. Cars, general merchandise, and prepared restaurant food are all taxed at 7.25%, while unprepared groceries and prescription drugs stay exempt statewide.
Ranked against the rest of the state, Mercer County is the 8th-highest of Ohio's 88 counties, tied with 50 others on 7.25%. In hard numbers that matters most on big-ticket buys: a $30,000.00 car costs $2,175.00 in sales tax here. Registering the same car in Butler County (6.50%, Ohio's lowest) would cost $1,950.00 — a $225.00 difference. At the other end, Cuyahoga County (8.00%) would charge $2,400.00. Ohio taxes a vehicle at the rate of the buyer's county of residence, not the dealer's, so the county on your registration is the one that sets the bill.
Mercer County is seated at Celina, covers 463 square miles and is home to 42,438 people — the 57th-most-populous of Ohio's 88 counties, at about 92 people per square mile. 10 ZIP codes fall inside it, running from 45310 to 45883, and every one of them pays the same 7.25% — Ohio municipalities cannot levy a sales tax of their own, so there is no city surcharge anywhere in the county. Mercer County also borders Indiana, where a different state's sales tax applies entirely — Ohio's 5.75% base does not follow you across the state line, but Ohio use tax generally does when you bring the item home.
Population: U.S. Census Bureau, American Community Survey 5-year estimate (2023).
Calculate tax in Mercer County
Calculate Ohio Sales Tax
Ohio · 2026 tax year · all 88 countiesCalculate total cost and exact Ohio state + county tax on your pre-tax purchase.
An official 2026 estimate based on Ohio Department of Taxation rate schedules (R.C. 5739.02). Actual checkout receipts round intermediate fractions per R.C. 5739.025.
Mercer County sales tax by purchase amount
| Purchase | Sales Tax (7.25%) | Total |
|---|---|---|
| $1.00 | $0.07 | $1.07 |
| $5.00 | $0.36 | $5.36 |
| $10.00 | $0.73 | $10.73 |
| $25.00 | $1.81 | $26.81 |
| $50.00 | $3.63 | $53.63 |
| $100.00 | $7.25 | $107.25 |
| $500.00 | $36.25 | $536.25 |
| $1,000.00 | $72.50 | $1,072.50 |
Groceries and prescription drugs are exempt statewide, so they carry $0 tax in Mercer County. Prepared food and general merchandise are taxed at 7.25%.
Mercer County sales tax FAQ
Statutory guidance reconciled against official Ohio Department of Taxation regulations, county permissive levies, and R.C. 5739 sourcing rules.
The combined sales tax rate in Mercer County is 7.25% in 2026. That is Ohio's 5.75% state base plus a 1.50% county and transit portion.
At 7.25%, sales tax on a $100 taxable purchase in Mercer County is $7.25, for a total of $107.25.
No. Unprepared groceries and prescription drugs are exempt from Ohio sales tax statewide, so they are not taxed in Mercer County. Prepared food is taxable at 7.25%.
10 Ohio ZIP codes have Mercer County as their primary county, including 45310, 45822, 45826, 45828, 45846. All of them use the 7.25% combined rate. Because ZIP boundaries can cross county lines, a delivery address near the county line should be checked against Ohio's rate-by-address lookup.
Mercer County borders Auglaize (7.25%), Darke (7.25%), Shelby (7.25%), Van Wert (7.25%), plus Indiana. None of them charge less than Mercer's 7.25%.
At 7.25%, Mercer County has the 8th-highest combined sales tax rate of Ohio's 88 counties, tied with 50 other counties. Statewide, combined rates run from 6.50% to 8.00%.
Counties bordering Mercer County
Mercer County shares a line with 4 other Ohio counties plus Indiana. Crossing one of these lines genuinely changes the bill — though which side counts depends on who is selling: an Ohio seller charges its own county's rate on an intrastate sale, while an out-of-state or marketplace seller charges yours.
| County | Combined rate | vs Mercer | Tax on $30,000.00 |
|---|---|---|---|
| Auglaize County | 7.25% | same | $2,175.00 |
| Darke County | 7.25% | same | $2,175.00 |
| Shelby County | 7.25% | same | $2,175.00 |
| Van Wert County | 7.25% | same | $2,175.00 |
No county bordering Mercer charges less than 7.25%, so there is no cheaper neighbour to cross into.
ZIP codes in Mercer County (7.25% sales tax)
10 Ohio ZIP codes have Mercer County as its primary county. Every address in them pays the same 7.25% combined rate — 5.75% state plus 1.50% county and transit.
- 45310
- 45822
- 45826
- 45828
- 45846
- 45860
- 45862
- 45866
- 45882
- 45883
ZIP codes are a USPS delivery construct and a few straddle county lines, so a border address can fall in a different taxing county than its ZIP suggests. Check any borderline address with the ZIP code sales tax lookup or Ohio's official rate-by-address finder before you file.
Compare Mercer County rates
- Butler — 6.50%
- Cuyahoga — 8.00%
- Franklin — 8.00%
- Hamilton — 7.80%
- Lucas — 7.75%
- Montgomery — 7.50%
- Stark — 6.50%
- Summit — 6.75%
- Monroe — 7.25%
- Morgan — 7.25%
- Morrow — 7.25%
- Muskingum — 7.25%
- Noble — 7.25%
- Paulding — 7.25%
- See all 88 counties →
- Browse Ohio rates by city →
Bordering counties: Compare Mercer County (7.25%) with neighboring Auglaize County (7.25%), Darke County (7.25%), and Shelby County (7.25%).
Commercial sellers: Review our guide on Ohio tax exemption forms (STEC B and STEC U) guide to stay fully aligned with state tax regulations.
Compare statewide: See where Mercer County ranks across the full Ohio sales tax rates by county table.
Cross-border shopping & vehicles: Buying across state lines? Check our Ohio vs. Indiana sales tax comparison (Mercer border).
Address verification: Some postal ZIP codes in Mercer County touch adjacent counties. To look up a precise street address, use our Ohio sales tax rate by address tool.
Ohio Sales Tax Core Reference Guides:
Rate source: the 7.25% combined rate for Mercer County was verified against the Ohio Department of Taxation's County Rate Table by ZIP Code on . Ohio county rates change on quarterly boundaries; for a legally definitive rate at a specific street address, use the Department's The Finder lookup — our guide to using The Finder walks through it.