This collection is made up of records of the various agencies of the church. It also includes material regarding local churches and annual conferences. The collection is made up of fourteen series. The four largest series which make up the bulk of the collection are the Woman's Missionary Society, Missionary Society, Annual Conferences, and Sunday School and Tract Union.

Record types include: correspondence, photocopies, handwritten transcripts, publications, photographs, financial records and contracts. This is the only known extent collection of Bishop Otterbein' s papers in the Western Hemisphere. The collection contains autographs and his ministerial credentials.

The John Dreisbach Papers contains his printed sermon book, sermon outline book (1853-1854), and a personal diary - all written in German. In the sermon outline book, there is a reference to an 1876 date which relates to A. E. Dreisbach's estate; a descendant's of John. After the A. E. Dreisbach entry, writings from the childhood of Arthur W. Dreisbach, another descendant, can be found. There are extra copies of his John's sermons with English translations. The images include two glass ambrotype portraits of John and his and two additional photographs of John. There is correspondence to a Reverend A. Stapleton, as well as other correspondence, which gives information about Dreisbach and items within the collection.

Records pertaining to Dreisbach's family history are in notation format. There are other personal papers which include poems, hymns, a copy of John's final testament and a couple of passages from his journal. These records are written in both German and English. The sole artifact is a lamp bracket from the First Evangelical Church in Dayton, Ohio, which was used by John Dreisbach as a potato masher.

This collection is made up of records of the various agencies of the church. It also includes material regarding local churches and annual conferences. The collection is made up of thirteen series. The three largest series which make up the bulk of the collection are the Missionary Society, the Woman's Missionary Society, and the Board of Christian Education.

This collection is made up of the administrative material from the Board of Missions. It also includes the records of the World Mission Division, the Division of Home Missions and Church Extension and its various departments and mission fields, the National Missions Division and the Mission Advance Program. The collection is made up of six series. Although there is some material from 1862 and the 1970's, the bulk of the material is from 1946 to 1968.