Amadi-Ama was founded by Chief Iringe Inimgbatuboni and his brethren, who migrated from Koko Polo in Ogoloma of Okrika Island. Some of the men and women who settled at Amadi-Ama bore Christian influence from Saint Peter's Church, Okrika, and maintained regular contact with the Church — ferrying across in dug-out canoes every Wednesday for class meetings and on Sundays for services.
Chiefs Samuel Amadi, Josiah Omoni Koko and David Olunwa Inimgbatuboni were devoted Christian leaders who piloted the affairs of the early Christian community. A church was eventually started in Amadi-Ama around 1885, beginning as morning and evening prayers in a private room in Olunwa's compound, with Tom Amadi as regular conductor. As converts multiplied, the worshippers moved to a larger room in Amadi's compound, conducted by Thomas Olunwa, ably assisted by Madam Dinah Ogonna Olunwa.
A temporary structure was erected in 1895, which formed the nucleus of what later developed into Bethel Church. The Superintendent Pastor of Okrika District, Late Rev. J. Max. A. Cole, employed Mr. Isaiah K. T. Amadi as the first Teacher/Agent. The structure was declared open for worship by Late Venerable Archdeacon Dandeson Crowther, who named it Bethel Church.
In the 1920s, a permanent building was needed. Chief David Olunwa donated the land, and funds were raised from all taxable males and married women. The first permanent church was erected and dedicated by Late Bishop A. M. Gelsthorpe D.S.O., D.D. in 1938.
After the cessation of Civil War hostilities in 1970, the Amadi-Ama community, grateful to God for their liberation, decided to erect a new edifice. Under the renowned veteran Church teacher, Late Mr. Darrick K. Wakama, the foundation was dug and building commenced in early 1970. By April 19, 1975, the foundation stone of the new Bethel Church was laid by the then Diocesan Bishop, Rtd. Rt. Rev. Yibo A. Fubara JP, with the inscription: