Census Data and the 'No Religion' Shift
A parish council in a suburban Sydney electorate is reviewing three decades of census data. In 1991, 74% of local residents identified as Christian and 12% claimed no religion. In 2021, 44% identified as Christian and 38% claimed no religion. Over the same period the suburb's population grew from 28,000 to 41,000, with the largest growth among residents born in India, China and Vietnam. The parish runs a primary school, an aged-care facility and a weekly food bank. Weekly Mass attendance fell from 1,900 in 1991 to 620 in 2021, even though the absolute number of local Christians fell only from about 20,700 to about 18,000. A council member argues the parish should sell the aged-care site to fund a youth ministry. Another argues the data show the parish should redirect resources toward newly arrived migrant communities. The parish priest asks for a reasoned analysis rather than a vote.
1. Analyse what the census figures do and do not tell the parish council.
Read the worked answer
The figures tell the council several things clearly. First, the proportion of Christians has fallen sharply (74% to 44%) while the absolute number fell much less (about 20,700 to 18,000), because population growth partly offset the decline in share. Second, the 'no religion' category grew both proportionally and absolutely. Third, migration from India, China and Vietnam has reshaped the local religious landscape, though the census does not tell us what those residents believe; it only records stated affiliation.
The figures do not tell the council why attendance fell so much faster than affiliation. Attendance dropped from 1,900 to 620, a fall of about two-thirds, while affiliation fell by only about 13%. This gap is the most important finding: many residents still identify as Christian but do not practise weekly. Affiliation is a cultural and identity marker as much as a measure of belief.
The council should also be cautious about causation. The data cannot show whether migration caused the Christian decline, whether secularisation did, or whether both are operating. Correlation across three decades is not proof of cause. Finally, 'no religion' is not the same as atheism or hostility to religion; it may include spiritual-but-not-religious identities that the census cannot capture.
2. Recommend a resource decision and justify it using the data and the parish's mission.
Read the worked answer
A defensible recommendation should not simply choose between the two councillors' options, because both rest on partial readings.
Selling the aged-care site to fund youth ministry treats the attendance collapse as a youth-engagement problem. But the data do not show that young people are the main absent group; they show a broad gap between affiliation and practice across the population. A youth ministry may be worthwhile, but the data do not establish it as the priority, and disposing of an aged-care asset is irreversible.
Redirecting entirely to migrant communities is better supported by the demographic shift, but it risks treating migrants as a single bloc. Indian, Chinese and Vietnamese residents include Christians, Hindus, Buddhists and people of no religion. A parish that assumes new arrivals are a mission field may misread its neighbours.
A stronger recommendation is a staged, evidence-led reallocation. First, retain the aged-care site because the ageing Christian population remains a genuine pastoral responsibility and the asset is hard to recover once sold. Second, fund a modest pilot of culturally specific outreach, developed with the communities themselves rather than for them. Third, invest in re-engaging the large 'affiliated but non-practising' group, which the data identify as the largest single opportunity. Set review points at 12 and 24 months, and gather local data (attendance, pilot participation, community feedback) before any irreversible decision. The justification is that the data support diagnosis, not a single predetermined solution.