Contee dell'Ohio
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Le Contee dell'Ohio sono le 88 suddivisioni principali dello stato. I capoluoghi sono tra parentesi. I numeri mostrati appaiono nella parte bassa delle targhe automobilistiche ed è usato anche per altri codici amministrativi.
Dopo il nome del capoluogo e le eventuali note è ostrato il numero di township della contea, escluse le paper township.
- Adams County (West Union) — 15
- Allen County (Lima) — 10
- Ashland County (Ashland) — 15
- Ashtabula County (Jefferson) — 27
- Athens County (Athens) — 14
- Auglaize County (Wapakoneta) — 14
- Belmont County (St. Clairsville) — 16
- Brown County (Georgetown) — 16
- Butler County (Hamilton) — 13
- Carroll County (Carrollton) — 14
- Champaign County (Urbana) — 12
- Clark County (Springfield) — 10
- Clermont County (Batavia) — 14
- Clinton County (Wilmington) — 13
- Columbiana County (Lisbon) — 18
- Coshocton County (Coshocton) — 22
- Crawford County (Bucyrus) — 16
- Cuyahoga County (Cleveland, largest metro area in Ohio) — 2
- Darke County (Greenville) — 20
- Defiance County (Defiance) — 12
- Delaware County (Delaware) — 18
- Erie County (Sandusky) — 9
- Fairfield County (Lancaster) — 13
- Fayette County (Washington Court House) — 10
- Franklin County (Columbus, state capital) — 17
- Fulton County (Wauseon) — 12
- Gallia County (Gallipolis) — 15
- Geauga County (Chardon) — 16
- Greene County (Xenia) — 11
- Guernsey County (Cambridge) — 19
- Hamilton County (Cincinnati) — 12
- Hancock County (Findlay) — 17
- Hardin County (Kenton) — 15
- Harrison County (Cadiz) — 15
- Henry County (Napoleon) — 13
- Highland County (Hillsboro) — 17
- Hocking County (Logan) — 11
- Holmes County (Millersburg) — 14
- Huron County (Norwalk) — 19
- Jackson County (Jackson) — 12
- Jefferson County (Steubenville) — 14
- Knox County (Mount Vernon) — 22
- Lake County (Painesville) — 5
- Lawrence County (Ironton) — 14
- Licking County (Newark) — 25
- Logan County (Bellefontaine) — 17
- Lorain County (Elyria) — 18
- Lucas County (Toledo) — 11
- Madison County (London) — 14
- Mahoning County (Youngstown) — 14
- Marion County (Marion) — 15
- Medina County (Medina) — 17
- Meigs County (Pomeroy) — 12
- Mercer County (Celina) — 14
- Miami County (Troy) — 12
- Monroe County (Woodsfield) — 18
- Montgomery County (Dayton) — 9
- Morgan County (McConnelsville) — 14
- Morrow County (Mount Gilead) — 16
- Muskingum County (Zanesville) — 25
- Noble County (Caldwell) — 15
- Ottawa County (Port Clinton) — 12
- Paulding County (Paulding) — 12
- Perry County (New Lexington) — 14
- Pickaway County (Circleville) — 15
- Pike County (Waverly) — 14
- Portage County (Ravenna) — 18
- Preble County (Eaton) — 12
- Putnam County (Ottawa) — 15
- Richland County (Mansfield) — 18
- Ross County (Chillicothe) — 16
- Sandusky County (Fremont) — 12
- Scioto County (Portsmouth) — 16
- Seneca County (Tiffin) — 15
- Shelby County (Sidney) — 14
- Stark County (Canton) — 17
- Summit County (Akron) — 9
- Trumbull County (Warren) — 24
- Tuscarawas County (New Philadelphia) — 22
- Union County (Marysville) — 14
- Van Wert County (Van Wert) — 12
- Vinton County (McArthur) — 12
- Warren County (Lebanon) — 11
- Washington County (Marietta) — 22
- Wayne County (Wooster) — 16
- Williams County (Bryan) — 12
- Wood County (Bowling Green) — 19
- Wyandot County (Upper Sandusky) — 13