Hamilton County, Ohio Sales Tax Rate

Hamilton County's 7.80% rate sits above the statewide average of 7.14%. Across Ohio, combined rates run from 6.50% to 8.00%, so where you buy genuinely changes the bill. Ohio is unusual here: for most sales by an Ohio seller to an Ohio buyer the rate follows the seller's location, not yours (R.C. 5739.033(B)(1) sources intrastate sales to where the vendor receives the order). Out-of-state sellers and online marketplaces are the exception — they source to your delivery address, so your home county rate is the one that applies there. See all 88 Ohio county rates side by side.

Whether you're shopping in Cincinnati or anywhere else in Hamilton County, a taxable purchase adds 2.05% in county and transit tax on top of Ohio's 5.75% state base — the 7.80% combined rate shown above. No other Ohio county charges exactly this rate. Cars, general merchandise, and prepared restaurant food are all taxed at 7.80%, while unprepared groceries and prescription drugs stay exempt statewide.

Ranked against the rest of the state, Hamilton County is the 3rd-highest of Ohio's 88 counties. In hard numbers that matters most on big-ticket buys: a $30,000.00 car costs $2,340.00 in sales tax here. Registering the same car in Butler County (6.50%, Ohio's lowest) would cost $1,950.00 — a $390.00 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.

Hamilton County is seated at Cincinnati, covers 407 square miles and is home to 838,418 people — the 3rd-most-populous of Ohio's 88 counties, at about 2,058 people per square mile. 78 ZIP codes fall inside it, running from 45001 to 45999, and every one of them pays the same 7.80% — Ohio municipalities cannot levy a sales tax of their own, so there is no city surcharge anywhere in the county. Hamilton County also borders Indiana and Kentucky, 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.