The history of Ohio as a state began when the Northwest Territory was divided in 1800, and the remainder reorganized for admission to the union on March 1, 1803, as the 17th state of the United States.

6 days ago · Browse 58+ historic sites & museums located in 40 counties across Ohio. Search by site, date or topic to find (or plan) the event that's just right for you. Search our collections, visit the Archives & Library and see what other research tools we have to offer.

Jul 23, 2024 · Known for its diverse geography, from flat plains to rolling hills, Ohio was a crucial battleground during the War of 1812. It later became a key state in helping enslaved people escape to...

Jan 27, 2025 · The first state to be carved from the Northwest Territory, Ohio became the 17th member of the union on March 1, 1803. In many respects, Ohio has come to reflect the urbanized, industrialized, and ethnically mixed United States that developed from an earlier agrarian period.

The worst weather disaster in Ohio history occurred along the Great Miami River in 1913. Known as the Great Dayton Flood, the entire Miami River watershed flooded, including the downtown business district of Dayton. As a result, the Miami Conservancy District was created as the first major floodplain engineering project in Ohio and the United ...

Nov 8, 2007 · Ohio has a rich heritage of people and places that helped shape North America. Through the remarkable feats, heart-wrenching struggles and inspired inventions, Ohioans have left an indelible mark...

Jan 24, 2025 · Present-day Ohio was largely unoccupied when the first Europeans arrived in the 17th century. Villages of indigenous peoples—the Miami, Huron (Wyandot), Shawnee, Delaware, Iroquois (Mingo), and Ottawa—appeared in the 18th century.