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-high household income quartile held the largest share among households with income in Adelaide Plains, accounting for 30.9%.

Section overview

Household income quartiles

Adelaide Plains - Households (Enumerated)

This table summarises household income quartiles for Adelaide Plains in 2021 for persons, with comparison against Regional SA and change since 2016.

Household income quartiles snapshot

2021 distribution by category for Adelaide Plains, with comparison markers for Regional SA.

Adelaide Plains
Regional SA

Lowest group

2021 count

589

% of total

19.4%

Change from 2016

-

Medium lowest

2021 count

705

% of total

23.3%

Change from 2016

-

Medium highest

2021 count

937

% of total

30.9%

Change from 2016

-

Highest group

2021 count

801

% of total

26.4%

Change from 2016

-

Data table

Household income quartiles for Adelaide Plains. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Regional SA.

Household income quartiles for Adelaide Plains. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Regional SA.
Household income quartiles for Adelaide Plains. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Regional SA.
Category20212016Change
Count%Regional SA%Count%Regional SA%Countpp
Lowest group58919.4%31.3%--29.5%--
Medium lowest70523.3%28.1%--27.9%--
Medium highest93730.9%23.2%--24.0%--
Highest group80126.4%17.5%--18.6%--
Total Households3,032100.0%100.0%--100.0%--