Ohio, before white, European settlers got there, was already home to American Indians. The earliest human inhabitants of what is now Ohio were Paleo-Indian peoples, who lived in the area as early as 13,000 BC. The "mound builders" later occupied what is now Ohio.
Ohio was the 17th U.S. state to join the Union, doing so on 19 February 1803...at that time, the U.S. Congress accepted the notice from the territory's constitutional convention.
The French were the first Europeans to colonize the Ohio area, setting up a system of trading posts to control the fur trade. In 1754 Geroge Washington, then acting for England, led a military unit to dislodge the French, starting the French-Indian War. It resulted in the Treaty of Paris; the French ceded control of Ohio and the old Northwest to Great Britain.