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| A list of counties in Ohio and
related data including year formed, square miles of area, population,
and population density. |
| County |
Formed |
Sq. Miles |
Pop* |
Maps |
| Adams |
|
|
27,330 |
|
| Allen |
|
|
108,473 |
|
| Ashland |
|
|
52,523 |
|
| 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 |
|
|
|
|
| Van Wert |
|
|
|
|
| Vinton |
|
|
|
|
| Warren |
|
|
|
|
| Washington |
|
|
|
|
| Wayne |
|
|
|
|
| Williams |
|
|
|
|
| Wood |
|
|
|
|
| Wyandot |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Total |
|
|
|
|
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| |
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Related Links & Resources:
● Tennessee State Parks
●
Ohio
National Parks
●
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●
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