Counties of Ohio

There are eighty-eight counties in the state of Ohio.	
County 	County Seat	Creation Date	Population (2007 est)
Adams 	Mount Union	 	
Allen 	Lima 	 	
Ashland 	Ashland 	 	
Athens 	Athens 	 	
Auglaize	Wapakoneta 	 	
== List of counties ==
Adams · Allen · Ashland · Ashtabula · Athens · Auglaize · Belmont · Brown · Butler · Carroll · Champaign · Clark · Clermont · Clinton · Columbiana · Coshocton · Crawford · Cuyahoga · Darke · Defiance · Delaware · Erie · Fairfield · Fayette · Franklin · Fulton · Gallia · Geauga · Greene · Guernsey · Hamilton · Hancock · Hardin · Harrison · Henry · Highland · Hocking · Holmes · Huron · Jackson · Jefferson · Knox · Lake · Lawrence · Licking · Logan · Lorain · Lucas · Madison · Mahoning · Marion · Medina · Meigs · Mercer · Miami · Monroe · Montgomery · Morgan · Morrow · Muskingum · Noble · Ottawa · Paulding · Perry · Pickaway · Pike · Portage · Preble · Putnam · Richland · Ross · Sandusky · Scioto · Seneca · Shelby · Stark · Summit · Trumbull · Tuscarawas · Union · Feet · Vinton · Warren · Washington · Wayne · Williams · Wood · Wyandot
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The Ohio Constitution allows counties to set up a charter government as many cities and villages do, but only Summit County has done so. Counties do not possess home rule powers and can do only what has been expressly authorized by the Ohio General Assembly. Ohio law defines a structure for county government, although each county may choose to define its own. Summit County has chosen an alternate structure, while all of the other counties use the default structure. The elected county officials include a sheriff (the highest law enforcement officer in the county); prosecutor (equivalent of a district attorney in other states); coroner, engineer, auditor, treasurer and clerk of courts.