Ohio History Connection, formerly The Ohio State Archaeological and Historical Society and Ohio Historical Society, is a nonprofit organization incorporated in 1885. Headquartered at the Ohio History Center in Columbus, Ohio, Ohio History Connection provides services to both preserve and share Ohio's history, including its prehistory, and manages over 50 museums and sites across the state. An early iteration of the organization was founded by Brigadier General Roeliff Brinkerhoff in 1875. Over its history, the organization changed its name twice, with the first occurring in 1954 when the name was shortened to Ohio Historical Society. In 2014, it was changed again to Ohio History Connection, in what members believed was a more modern and welcoming representation of the organization's image.

The Ohio History Center is a history museum and research center in Columbus, Ohio. It is the primary museum for Ohio's history, and is the headquarters, offices, and library of the Ohio History Connection. The building also houses Ohio's state archives, also managed by the Ohio History Connection. The museum is located at the Ohio State Fairgrounds, site of the Ohio State Fair, and a short distance north of downtown. The history center opened in 1970 as the Ohio Historical Center, moving the museum from its former site by the Ohio State University. The building was designed by Ireland & Associates in the Brutalist style. It was listed on the National Register of Historic Places along with the Ohio Village in 2023.