The Atlantic Coast Conference of Mennonite Church USA was originally formed in 1978 out of what had been the eastern district of the Ohio and Eastern Conference. In 2010 the Conference was headquartered in Lancaster, Pa. and was composed of thirty-four congregations.

Please click here for a container list of ACC congregational records. This is not a complete list of Atlantic Coast congregations, but it represents those congregations for which archival collections exist in the Lancaster Mennonite Historical Society. Some congregations listed are no longer part of the Atlantic Coast Conference.