Ohio is a state in the East North Central region of the Midwestern United States. Of the fifty states, it is the 34th-largest by area, the seventh-most populous, and the tenth-most densely populated.
The state takes its name from the Ohio River, whose name in turn originated from the Seneca word ohiːyo’, meaning “good river”, “great river”, or “large creek”. Partitioned from the Northwest Territory, Ohio was the 17th state admitted to the Union on March 1, 1803, and the first under the Northwest Ordinance. Ohio is historically known as the “Buckeye State” after its Ohio buckeye trees, and Ohioans are also known as “Buckeyes”.
Ohio rose from the land west of Appalachia in colonial times through the Northwest Indian Wars as part of the Northwest Territory in the early frontier, to become the first non-colonial free state admitted to the union, to an industrial powerhouse in the 20th century before transitioning to a more information and service based economy in the 21st.