Ohio History Connection operates dozens of state historic sites across Ohio. Its headquarters is the 250,000-square-foot (23,000 m²) Ohio History Center in Columbus, Ohio, a Brutalist concrete structure. Extensive exhibits cover Ohio's history from the Ice Age to the present. The Center includes state archives and library spaces, a gift shop, and administrative and educational facilities. The 1989 Smithsonian Guide to Historic America described the Center as "probably the finest museum in America devoted to pre-European history."
Ohio Village, a reconstructed 1890s-era town, is a living museum on the grounds of the Ohio History Center. In 2002, budget cuts forced the Ohio Village to close except for special events, school and tour groups. Since 2012, it is open to visitors from Memorial Day to Labor Day and for special events such as the Country Living Fair, All Hallows Eve, and Dickens of a Christmas.
The village houses the renowned Ohio Village Muffins, a vintage baseball club. Since 1981, the Muffins have promoted the preservation of the game as it was played in 1860. Competitions are played every year.
Ohio History Connection also provides educators with resources for the state's schools. Field trips, outreach programs, and educational kit trunks are available to assist teachers with supplemental learning in their classrooms. Also offered are distance learning courses. Affiliated with the Ohio History Connection is the Ohio Educational Resources Center, which loans materials to assist teachers with their lessons. The society also provides public programs that include speakers, theatrical productions, conferences, workshops, holiday gatherings, and presentations. The topics of these programs range from the Underground Railroad to the role of the state in other historical events.