Miami County, Ohio Sales Tax Rate
Buying anywhere in Miami County? The combined sales tax rate is 7.00%. Below is the full breakdown and a calculator already set to Miami County.
Miami County Rate Breakdown
Bordering County Savings Radar
How Miami's 7.00% 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 Miami County charge this 7.00% 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, Miami County residents owe $2,100.00.
Groceries & Medicine
Unprepared food for human consumption and prescription drugs are 100% exempt ($0 tax) statewide in Miami County under the Ohio Constitution (Art. XII, § 13), R.C. 5739.02(B)(2) (food), and R.C. 5739.02(B)(18) (prescription drugs).
Miami County's 7.00% rate sits below 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 Miami County, a taxable purchase adds 1.25% in county and transit tax on top of Ohio's 5.75% state base — the 7.00% combined rate shown above. 10 of Ohio's 88 counties charge this exact rate. Cars, general merchandise, and prepared restaurant food are all taxed at 7.00%, while unprepared groceries and prescription drugs stay exempt statewide.
Ranked against the rest of the state, Miami County is the 59th-highest of Ohio's 88 counties, tied with 10 others on 7.00%. In hard numbers that matters most on big-ticket buys: a $30,000.00 car costs $2,100.00 in sales tax here. Registering the same car in Butler County (6.50%, Ohio's lowest) would cost $1,950.00 — a $150.00 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.
Miami County is seated at Troy, covers 407 square miles and is home to 109,549 people — the 25th-most-populous of Ohio's 88 counties, at about 269 people per square mile. 14 ZIP codes fall inside it, running from 45308 to 45383, and every one of them pays the same 7.00% — Ohio municipalities cannot levy a sales tax of their own, so there is no city surcharge anywhere in the county.
Population: U.S. Census Bureau, American Community Survey 5-year estimate (2023).
Calculate tax in Miami 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.
Miami County sales tax by purchase amount
| Purchase | Sales Tax (7.00%) | Total |
|---|---|---|
| $1.00 | $0.07 | $1.07 |
| $5.00 | $0.35 | $5.35 |
| $10.00 | $0.70 | $10.70 |
| $25.00 | $1.75 | $26.75 |
| $50.00 | $3.50 | $53.50 |
| $100.00 | $7.00 | $107.00 |
| $500.00 | $35.00 | $535.00 |
| $1,000.00 | $70.00 | $1,070.00 |
Groceries and prescription drugs are exempt statewide, so they carry $0 tax in Miami County. Prepared food and general merchandise are taxed at 7.00%.
Miami 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 Miami County is 7.00% in 2026. That is Ohio's 5.75% state base plus a 1.25% county and transit portion.
At 7.00%, sales tax on a $100 taxable purchase in Miami County is $7.00, for a total of $107.00.
No. Unprepared groceries and prescription drugs are exempt from Ohio sales tax statewide, so they are not taxed in Miami County. Prepared food is taxable at 7.00%.
14 Ohio ZIP codes have Miami County as their primary county, including 45308, 45312, 45317, 45318, 45326. All of them use the 7.00% 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.
Miami County borders Champaign (7.25%), Clark (7.25%), Darke (7.25%), Shelby (7.25%), Montgomery (7.50%). None of them charge less than Miami's 7.00%.
At 7.00%, Miami County has the 59th-highest combined sales tax rate of Ohio's 88 counties, tied with 10 other counties. Statewide, combined rates run from 6.50% to 8.00%.
Counties bordering Miami County
Miami County shares a line with 5 other Ohio counties. 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 Miami | Tax on $30,000.00 |
|---|---|---|---|
| Champaign County | 7.25% | +0.25% | $2,175.00 |
| Clark County | 7.25% | +0.25% | $2,175.00 |
| Darke County | 7.25% | +0.25% | $2,175.00 |
| Shelby County | 7.25% | +0.25% | $2,175.00 |
| Montgomery County | 7.50% | +0.50% | $2,250.00 |
No county bordering Miami charges less than 7.00%, so there is no cheaper neighbour to cross into.
ZIP codes in Miami County (7.00% sales tax)
14 Ohio ZIP codes have Miami County as its primary county. Every address in them pays the same 7.00% combined rate — 5.75% state plus 1.25% county and transit.
- 45308
- 45312
- 45317
- 45318
- 45326
- 45337
- 45339
- 45356
- 45359
- 45361
- 45371
- 45373
- 45374
- 45383
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 Miami 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%
- Ottawa — 7.00%
- Portage — 7.00%
- Putnam — 7.00%
- Richland — 7.00%
- Union — 7.00%
- Ashland — 7.00%
- See all 88 counties →
- Browse Ohio rates by city →
Bordering counties: Compare Miami County (7.00%) with neighboring Champaign County (7.25%), Clark County (7.25%), and Darke County (7.25%).
Commercial sellers: Review our guide on when Miami County businesses must file sales tax returns to stay fully aligned with state tax regulations.
Compare statewide: See where Miami County ranks across the full Ohio sales tax rates by county table.
Address verification: Some postal ZIP codes in Miami 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 7.00% combined rate for Miami 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.