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 highest household income quartile held the largest share among households with income in Onkaparinga Hills, accounting for 39.9%.

Section overview

Household income quartiles

Onkaparinga Hills - Households (Enumerated)

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

Household income quartiles snapshot

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

Onkaparinga Hills
Onkaparinga (C)

Lowest group

2021 count

101

% of total

12.7%

Change from 2016

-

Medium lowest

2021 count

166

% of total

20.8%

Change from 2016

-

Medium highest

2021 count

212

% of total

26.6%

Change from 2016

-

Highest group

2021 count

318

% of total

39.9%

Change from 2016

-

Data table

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

Household income quartiles for Onkaparinga Hills. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Onkaparinga (C).
Household income quartiles for Onkaparinga Hills. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Onkaparinga (C).
Category20212016Change
Count%Onkaparinga (C)%Count%Onkaparinga (C)%Countpp
Lowest group10112.7%24.5%7910.6%23.5%--
Medium lowest16620.8%27.0%16121.6%27.0%--
Medium highest21226.6%26.4%20527.4%27.1%--
Highest group31839.9%22.1%30240.4%22.4%--
Total Households797100.0%100.0%747100.0%100.0%--