Income
Individual income quartiles
About this topic
Individual income quartiles group people aged 15 years and over into four evenly sized income ranges so the distribution of personal income can be compared objectively across areas and over time. The quartile method focuses on relative position in the income distribution rather than raw dollar brackets.
This topic is useful because direct income amounts are affected by inflation and wider economic change. Quartiles provide a clearer way to compare whether an area is becoming relatively lower, middle, or higher income over time.
Interpretation notes
- This is a derived distribution of personal income for people aged 15 years and over, with each quartile representing a quarter of the income distribution.
- Quartiles show relative position rather than fixed dollar brackets, which makes them more robust for comparisons over time.
Key insight
In 2021, the medium-high income quartile held the largest share among residents aged 15 and over in Eglinton (WA), accounting for 30.5%.
Section overview
Individual income quartiles
Eglinton (WA) - Persons aged 15+ (Usual residence)
This table summarises individual income quartiles for Eglinton (WA) in 2021 for persons, with comparison against Wanneroo (C) and change since 2016.
Individual income quartiles snapshot
2021 distribution by category for Eglinton (WA), with comparison markers for Wanneroo (C).
Lowest group
2021 count
514
% of total
20.8%
Change from 2016
-3.3pp
514
20.8%
-3.3pp
Medium lowest
2021 count
505
% of total
20.4%
Change from 2016
-1.4pp
505
20.4%
-1.4pp
Medium highest
2021 count
756
% of total
30.5%
Change from 2016
-8.6pp
756
30.5%
-8.6pp
Highest group
2021 count
701
% of total
28.3%
Change from 2016
+13.4pp
701
28.3%
+13.4pp
Chart view
Individual income quartiles change
Absolute change in category counts between 2016 and 2021.
Lowest group
+493
-3.3pp
Medium lowest
+486
-1.4pp
Medium highest
+722
-8.6pp
Highest group
+688
+13.4pp
Data table
Individual income quartiles for Eglinton (WA). Individual income quartiles. 2021 and 2016 counts, percentages, and change compared with Wanneroo (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Wanneroo (C)% | Count | % | Wanneroo (C)% | Count | pp | |
| Lowest group | 514 | 20.8% | 25.7% | 21 | 24.1% | 25.5% | +493 | -3.3pp |
| Medium lowest | 505 | 20.4% | 23.7% | 19 | 21.8% | 21.3% | +486 | -1.4pp |
| Medium highest | 756 | 30.5% | 25.6% | 34 | 39.1% | 24.7% | +722 | -8.6pp |
| Highest group | 701 | 28.3% | 25.0% | 13 | 14.9% | 28.5% | +688 | +13.4pp |
| Total persons aged 15+ | 2,476 | 100.0% | 100.0% | 87 | 100.0% | 100.0% | +2,389 | 0.0pp |