The National Association of Congregational Christian Churches (NACCC) is a voluntary association of churches committed to fellowship with each other.  It is designed to allow local congregations to consult and advise together as churches upon matters of common concern to them, both temporal and spiritual, without infringing on their self-government.

The NACCC also maintains cordial relationships with a number of autonomous state and regional Congregational associations.  Congregational Christian Churches are not required to belong to either the NACCC or a state or regional association.  However, many choose to belong to both in order to strengthen their church ministries through the blessings of essential services and collaboration.

Once a year, normally in June, representatives of NACCC member churches gather for a four-day Annual Meeting held in a different city each year.  Attendees experience the joy of fellowship, take part in valuable seminars, hear dynamic and inspiring speakers, and make the major decisions of the Association during business sessions.

The activities of the NACCC are conducted and supported by its Executive Committee and a number of other committees, divisions and commissions, as well as professional staff.  The Association's national office is in Oak Creek, Wisconsin, a suburb of Milwaukee.