Ohio Counties and County Seats: Adams County - West Union Allen County - Lima Ashland County - Ashland Ashtabula County - Jefferson Athens County - AthensWhat are the 3 major cities of Ohio?
Major cities Ohio has four cities with populations over 275,000: Columbus, Cleveland, Cincinnati and Toledo. Only California and Texas have more cities of this size. Over one-half of Ohio’s GDP is created in its three largest metro areas: Cleveland, Columbus and Cincinnati.How many counties are there in Ohio?
There are a total of 88 counties in the state of Ohio. Among them, Washington County is the oldest one (established in 1788) while Noble County is the youngest (established in 1851). With population of 1,264,518, Franklin County is the most populated.