One in four Catholics in Broome Diocese are aged under 15, Wagga Wagga Diocese has the largest proportion of Catholics, and the Archdiocese of Melbourne has the largest number of Catholics, the reports have revealed.

They follow the release of the National Social Profile earlier this year, offering a glimpse of the overall Catholic population.

Professor Gabrielle McMullen, chair of the Australian Catholic Council for Pastoral Research, said the reports are a major undertaking every five years but a highly valued resource for diocesan leaders.

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