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OHOhio History
Ohio at a glance
Ohio was admitted to the Union on 1803, making it the 17th state. It joined the country 27 years after the Declaration of Independence. Its capital Columbus has been the seat of state government for most of the state's history.
Native peoples
For thousands of years before European contact, Indigenous peoples lived across what is now Ohio. Multiple distinct cultures developed in response to the region's geography — coastal peoples, plains peoples, river-valley peoples, mountain peoples — each with their own languages, governance, and trade networks. European colonization disrupted these civilizations dramatically, often through disease, displacement, and forced removal. Today, Ohio's Native heritage is preserved in place names, tribal nations within state borders, and ongoing cultural practices.
Path to statehood
The path from European exploration to statehood typically took decades. Ohio was admitted to the Union on 1803, after meeting the requirements set by Congress: sufficient population, a written constitution, and the consent of Congress. The process from initial settlement to statehood was the 17th time the US expanded.
The modern era
Today Ohio has a population of over 10 million and is one of the mid-sized states in the country. The capital is Columbus; the largest city is Columbus. Agriculture remains an important sector of the state economy. The political lean has shifted over time and now leans reliably Republican.
Key historical sites in Ohio
Ohio preserves its history through state parks, national monuments, historic districts, and museums. Battlefields, colonial towns, mission sites, Native American heritage areas, and Civil Rights landmarks (where applicable) anchor the state's heritage tourism. Visit the state's official tourism site for a current list.
Bordering states
Ohio shares borders with 5 other US states.
Learn US history through daily puzzles
Statedoku uses statehood era, Confederate or Union role, and admission years as recurring constraints. After a month of daily play, you'll know exactly when and how each state joined the Union.
Play today's puzzle →Common questions about Ohio history
When did Ohio become a state?
Ohio became a state in 1803, making it the 17th state admitted to the Union.
Was Ohio part of the Confederacy?
No, Ohio was not part of the Confederacy.
Was Ohio part of the Louisiana Purchase?
No.
Did Spain or France colonize Ohio?
Ohio was primarily under British colonial influence.
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