On 15 November 1951, Pope Pius XII announced that a new diocese would be created from the two archdioceses of Sydney and Canberra & Goulburn. To be named Wollongong, the diocese was officially established on 11 February 1952. Bishop Thomas McCabe was transferred from Port Pirie to become its first bishop and the historic Church of St Francis Xavier in Wollongong became the cathedral. At the time of establishment, there was a Catholic population of approximately 22,000 in 18 parishes.[citation needed]
While the Wollongong diocese is relatively recent, the churches of Campbelltown (1835), Appin (1837), Wollongong (1838), Picton (1847), Kiama (1852), Camden (1859), Shellharbour (1861), Nowra (1863), The Oaks (1865), Albion Park (1867), Bulli (1886), Berrima (1889) and Milton-Ulladulla (1890) trace their Catholic legacy back to the early times of European settlement and to the era of Archbishop John Bede Polding, Australia's first bishop.[citation needed]
Initially, the diocese was composed of parishes in the Illawarra, Shoalhaven and Southern Highland regions. In 1954 it was expanded to include Camden and Campbelltown and in 1975 the parishes of Batemans Bay, Moruya and Narooma reverted to the Archdiocese of Canberra & Goulburn. The boundaries of the diocese have since remained the same. The most recently established parish is Oran Park (founded on 22 June 2015),[1] which meets the borders of the Archdiocese of Sydney and the Diocese of Parramatta. Created out of Camden Parish, Oran Park was founded to meet the needs of the rapidly expanding population in the region.
Macarthur deanery with regular liturgical services held in the parishes of Camden (St Paul), Campbelltown (St John the Evangelist), Eagle Vale (Mary Immaculate), Ingleburn (Holy Family), Macquarie Fields (Mary, Mother of the Church), Picton (St Anthony), Rosemeadow (Our Lady Help of Christians), Ruse (St Thomas More), The Oaks (St Aloysius Parish), and Varroville (Our Lady of Mount Carmel)
South Coast deanery with regular liturgical services held in the parishes of Kangaroo Valley (St Joseph), Kiama (Ss Peter and Paul), Milton (St Mary Star of the Sea), Nowra (St Michael), and Vincentia (Holy Spirit)
The diocese is the eighth largest diocese in Australia in terms of Catholic population (out of 33 total) and the largest non-capital city diocese. The diocese now ministers to 195,000 Catholics in 31 parishes, with 15 migrant chaplaincies. There are 43 Catholic schools, various youth ministries and a range of aged care, disability and welfare services together with special faith movements in the local area.[citation needed]