Income
Household income quartiles
About this topic
Household income quartiles group households into four evenly sized income ranges so relative income position can be compared across places and across Census years. They provide a distribution view of household income rather than a simple count in fixed dollar brackets.
This topic is useful because raw household income amounts are influenced by inflation and broader economic shifts. Quartiles make it easier to see whether an area's households are concentrated toward lower, middle, or higher income positions over time.
Interpretation notes
- This is a derived distribution of total household income, so each quartile shows relative position rather than a fixed income bracket.
- It is useful for over-time comparison because quartile groupings are less distorted by inflation than raw dollar bands.
Key insight
In 2021, the lowest household income quartile held the largest share among households with income in Cranbrook (S), accounting for 32.9%.
Section overview
Household income quartiles
Cranbrook (S) - Households (Enumerated)
This table summarises household income quartiles for Cranbrook (S) in 2021 for persons, with comparison against Regional WA and change since 2016.
Household income quartiles snapshot
2021 distribution by category for Cranbrook (S), with comparison markers for Regional WA.
Lowest group
2021 count
116
% of total
32.9%
Change from 2016
-
116
32.9%
-
Medium lowest
2021 count
109
% of total
30.9%
Change from 2016
-
109
30.9%
-
Medium highest
2021 count
73
% of total
20.7%
Change from 2016
-
73
20.7%
-
Highest group
2021 count
55
% of total
15.6%
Change from 2016
-
55
15.6%
-
Chart view
Household income quartiles change
Absolute change in category counts between 2016 and 2021.
Lowest group
-
-
Medium lowest
-
-
Medium highest
-
-
Highest group
-
-
Data table
Household income quartiles for Cranbrook (S). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Regional WA.
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Regional WA% | Count | % | Regional WA% | Count | pp | |
| Lowest group | 116 | 32.9% | 29.0% | 132 | 38.0% | 29.1% | - | - |
| Medium lowest | 109 | 30.9% | 25.8% | 113 | 32.6% | 25.9% | - | - |
| Medium highest | 73 | 20.7% | 24.5% | 67 | 19.3% | 24.3% | - | - |
| Highest group | 55 | 15.6% | 20.7% | 35 | 10.1% | 20.7% | - | - |
| Total Households | 353 | 100.0% | 100.0% | 347 | 100.0% | 100.0% | - | - |