Abbreviated as YARP; referenced by 3 other explainers
Overseas arrivals shows when residents born overseas first came to Australia. It sorts them into eight year bands.
The figures come from Census data. The Australian Bureau of Statistics collects them.
ABS gives a separate Year of arrival not stated count, so this marker shows a Year of arrival not stated band alongside the year bands.
The bands are Pre-1981, 1981 to 1990, 1991 to 2000, 2001 to 2010, 2011 to 2015, 2016 to 2020, 2021 (Census year), and Year of arrival not stated. The 2011-2015 and 2016-2020 split marks a shift in the migrant mix from 2016 on. The oldest band, Pre-1981, covers everyone who arrived before 1981, so the long post-war migration period is shown as one group. The recent bands are split more finely.
The base count here is people born overseas, not all people in the area. The bands cover the whole overseas-born group, give or take small ABS privacy adjustments. People born in Australia are out of scope. To weigh this against the whole area, use the population pages and the birthplace marker side by side.
Year of arrival is set for usual residents born outside Australia. The Census asks for the year of the first long stay or move. It skips short trips and study trips before that first long stay.
ABS tweaks small-area counts to keep people safe, which can hide small cells. This is called perturbation.
The total counts people at their place of usual residence. It covers people in homes such as hospitals, aged-care homes, hostels, and student housing. It leaves out people just visiting from overseas.
Place Forecast splits each SA1 figure down to mesh blocks and sums them back to the area you see, so the small-area view is downscaled. The cultural diversity downscaling glossary explains the method and its limits.
Each band at the LGA level matches the ABS figure. This is LGA anchoring.
For service choices about one arrival group, read small-area figures as patterns, not exact counts. Validate against on-the-ground knowledge from community organisations before drawing conclusions.