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 Roxby Downs (M), accounting for 62.9%.

Section overview

Household income quartiles

Roxby Downs (M) - Households (Enumerated)

This table summarises household income quartiles for Roxby Downs (M) in 2021 for persons, with comparison against Regional SA and change since 2016.

Household income quartiles snapshot

2021 distribution by category for Roxby Downs (M), with comparison markers for Regional SA.

Roxby Downs (M)
Regional SA

Lowest group

2021 count

30

% of total

2.8%

Change from 2016

-

Medium lowest

2021 count

74

% of total

6.9%

Change from 2016

-

Medium highest

2021 count

297

% of total

27.5%

Change from 2016

-

Highest group

2021 count

679

% of total

62.9%

Change from 2016

-

Data table

Household income quartiles for Roxby Downs (M). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Regional SA.

Household income quartiles for Roxby Downs (M). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Regional SA.
Household income quartiles for Roxby Downs (M). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Regional SA.
Category20212016Change
Count%Regional SA%Count%Regional SA%Countpp
Lowest group302.8%31.3%413.9%29.5%--
Medium lowest746.9%28.1%585.5%27.9%--
Medium highest29727.5%23.2%24423.0%24.0%--
Highest group67962.9%17.5%71667.6%18.6%--
Total Households1,080100.0%100.0%1,059100.0%100.0%--