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Mar 9, 2022 · Ohio County Creation Dates and Parent Counties. See an interactive outline map of Ohio Historical Boundary Changes at Newberry Library site. [1] Select a year and the map will display the historical county boundaries. Click on map image for county details.
Counties of Ohio. There are 88 counties in the U.S. state of Ohio. Nine of them existed at the time of the Ohio Constitutional Convention in 1802. A tenth county, Wayne, was established on August 15, 1796, and encompassed roughly the present state of Michigan.
CountyFips Code [10]County Seat [11]Est. [12]Jul 10, 1797Mar 1, 1820Feb 24, 1846Jun 7, 1807George Washington began surveying land west of Virginia, land that later became the Northwest Territory and which, later still, became the states of Ohio, Michigan, Indiana, Illinois, Wisconsin, and part of Minnesota.
YearEvent1770George Washington began surveying land ...1778In Virginia, Illinois Co. was formed from ...1785Treaty of Harmar addressed issues with ...1787The Continental Congress created the ...Nov 6, 2009 · The first state formed in the Northwest Territory was Ohio in 1803. The 1810 Census of Ohio was lost, except for Washington County. The last new county formed in Ohio was Noble County in 1851. The boundaries of Ohio's 88 counties did not stabilize until 1888. Timeline Map.
Oct 17, 2016 · On January 10, 1820, the Ohio government authorized the creation of Union County. The state formed the county from parts of Franklin, Delaware, Logan, and Madison Counties.
Oct 16, 2013 · York City was laid out in 1741, and the County of York was established eight years later in 1749. Comprising an area of 26.4 square miles or 16,883 acres, York Township was formed in 1753 with relatively few settlers at the time. Thirty years later, there were approximately 900 people in the Township, most of them living in the southeast sections.
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The Ohio State University (Ohio State or OSU) is a public land-grant research university in Columbus, Ohio, United States. A member of the University System of Ohio, it was founded in 1870.
