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History and Facts of Ohio Counties

Ohio Counties – The old Northwest Territory originally included areas previously known as Ohio Country and Illinois Country. As Ohio prepared for statehood, the Indiana Territory was created, reducing the Northwest Territory to approximately the size of present-day Ohio plus the eastern half of the Lower Peninsula of Michigan and the eastern tip of the Upper Peninsula.

The State of Ohio entered the union as the 17th state on March 1, 1803. Ohio borders PennsylvaniaWest VirginiaKentuckyIndianaand Michigan. It has 88 Counties.

In 1788 the first Ohio counties that were created was Washington and Hamilton Counties.  The last county to be formed was Noble County in 1851.

List of Ohio Counties

Ohio is divided into 88 counties.

List of Old Former / Extinct Ohio Counties

Ohio has counties that no longer are in existence. A lot of these counties were established and disbanded within the 19th century; county borders have modified very little since 1900 in the vast most of states.

The below Ohio counties no longer exist:

?? County, Ohio

Created ? from ?. It was abolished ? and re-established as ? County on ?.

  • Illinois County, Virginia, formed in 1778 and constituted most of present-day Illinois, Indiana, Michigan, Ohio, and Wisconsin; abolished 5 January 1782; territory ceded by Virginia to Congress in March 1784

Map of Ohio County Boundary Changes from 1788 to 1888

This Interactive Map of Ohio Counties show the historical boundaries, names, organization, and attachments of every county, extinct county and unsuccessful county proposal from the creation of Ohio from 1788-1888.

Fun Facts about Ohio Counties

County Name Facts

The County names:

  • 0 of them named for Native American words or people,
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Counties by Year

In 1788 the first Ohio counties that were created was Washington and Hamilton Counties.  The last county to be formed was Noble County in 1851.

  • ? County was the first county created on ?.
  •  The last county to be formed was ? County on ?.
  •  

Facts for County Size

  • ? County (000 sq mi) is the largest county in Ohio.
  • ? County (000 sq mi) is the smallest county in Ohio.

Facts for County Population (2017 Est.)

  • ? County (000) is the most populated county in Ohio.
  • ? County (000) is the least populated county in Ohio.

Facts for Ohio Counties and Cities

Ohio’s 88 largest cities (2088) are:

  1. Birmingham (000) is in ? County and ? Counties
  2. Columbus, Cleveland, Cincinnati, Toledo, Akron, Dayton, Parma, Youngstown, Canton and Lorain