The Catholic Secretariat of Nigeria (CSN) is the administrative organ of the highest decision making body of the Catholic Church in Nigeria, the Catholic Bishops' Conference of Nigeria (CBCN).

Incorporated in March 15, 1958, CBCN, is the organ of unity, communion and solidarity for the millions of Catholics spread across the thirty six states of Nigeria and the Federal Capital Territory. It is the forum wherein the collegiality of the Nigerian Catholic bishops, as successors of the Apostles in union with the Pope, is expressed and where the idea of the Church as family is signified. Through the Conference, the archbishops and bishops of the ecclesiastical jurisdictions are able to speak and spearhead the teaching, prophetic and pastoral ministry of the Catholic Church in Nigeria.

The Catholic Secretariat of Nigeria, the Church has been able to make significant and effective input into the social, economic and political engineering of not only Nigeria both also some African countries, especially where the initiatives taken by the Church in Nigeria have been accepted as models. 

The Catholic Secretariat of Nigeria, in recent years, has expended resources in the promotion of integral human development in the country. Its most recent insertion in the legislative and budgetary processes in the country, at the National level, is a clear testimony of our capacity to participate and contribute adequately and appropriately to the re-engineering of our country in view of effective service of the common good. 

The Catholic Church in Nigeria has a total of 51 dioceses grouped into 9 provinces, serving about 30 million Catholics. CCFN is the arm of the church in Nigeria empowered to fight against hunger, disease and ignorance, a role it plays alongside the church and society department of CSN.