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 medium-low household income quartile held the largest share among households with income in Aldinga Beach, accounting for 29%.

Section overview

Household income quartiles

Aldinga Beach - Households (Enumerated)

This table summarises household income quartiles for Aldinga Beach in 2021 for persons, with comparison against Onkaparinga (C) and change since 2016.

Household income quartiles snapshot

2021 distribution by category for Aldinga Beach, with comparison markers for Onkaparinga (C).

Aldinga Beach
Onkaparinga (C)

Lowest group

2021 count

994

% of total

26.6%

Change from 2016

-

Medium lowest

2021 count

1,083

% of total

29.0%

Change from 2016

-

Medium highest

2021 count

997

% of total

26.7%

Change from 2016

-

Highest group

2021 count

657

% of total

17.6%

Change from 2016

-

Data table

Household income quartiles for Aldinga Beach. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Onkaparinga (C).

Household income quartiles for Aldinga Beach. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Onkaparinga (C).
Household income quartiles for Aldinga Beach. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Onkaparinga (C).
Category20212016Change
Count%Onkaparinga (C)%Count%Onkaparinga (C)%Countpp
Lowest group99426.6%24.5%83224.6%23.5%--
Medium lowest1,08329.0%27.0%1,00029.6%27.0%--
Medium highest99726.7%26.4%93327.6%27.1%--
Highest group65717.6%22.1%61418.2%22.4%--
Total Households3,731100.0%100.0%3,379100.0%100.0%--