Welcome to the Logan County Museum and Orr Mansion, 521 E. Columbus Ave, Bellefontaine, Ohio. This location became the new home of the Logan County Historical Society in 1989. The Society dates from the 1930 era and was reorganized in 1945 following World War II. Over the years hundreds of volunteers have donated thousands of hours of time to help preserve a look at the past. Historical artifacts, documents, genealogy information, and rooms full of historical furniture make this an exciting visit for the entire family.