Northwood is a small, unincorporated community crossroads village in northern Logan County, Ohio, United States.

B. Johnston, pastor of the Miami Reformed Presbyterian Church in Northwood, began teaching a small classical school in his study.

Eventually, Geneva Hall was opened in the spring of 1848, partially under the oversight of the Lakes Presbytery of the Reformed Presbyterian Church.

[4] Although the college flourished, it moved to Beaver Falls, Pennsylvania in 1880, largely because of Northwood's lack of a railroad and because of greater financial possibilities there.

[6] Because of the strongly abolitionist beliefs of the Reformed Presbyterian Church, and because of small caves in the woods and fields nearby, Northwood was a center for the Underground Railroad.