There are more than five million Catholics in Australia. It is the largest single Christian denomination, representing nearly 25% of the community.

The Church is made up of bishops, priests, deacons, men and women belonging to religious orders and lay people. Through their baptism, all are called to enter into the life of the Church.

The Church is organised into 32 dioceses, each headed by a Bishop. Dioceses include geographic areas as well as Eastern rites and the Military diocese. Each diocese is made up of smaller geographic areas, called parishes.