The Diocese of Bomadi (Latin: Dioecesis Bomadiensis) is a Latin Church ecclesiastical jurisdiction or diocese of the Catholic Church in Nigeria.

Its episcopal see is Bomadi, Delta State.

The diocese is a suffragan in the ecclesiastical province of the metropolitan Archdiocese of Benin City.

The Apostolic Vicariate of Bomadi straddles the Niger River and Niger Delta and includes portions of Delta State and Rivers State.

This article about a Roman Catholic diocese in Nigeria is a stub.