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 Lake Grace (S), accounting for 30.9%.

Section overview

Household income quartiles

Lake Grace (S) - Households (Enumerated)

This table summarises household income quartiles for Lake Grace (S) in 2021 for persons, with comparison against Regional WA and change since 2016.

Household income quartiles snapshot

2021 distribution by category for Lake Grace (S), with comparison markers for Regional WA.

Lake Grace (S)
Regional WA

Lowest group

2021 count

90

% of total

21.6%

Change from 2016

-

Medium lowest

2021 count

129

% of total

30.9%

Change from 2016

-

Medium highest

2021 count

120

% of total

28.8%

Change from 2016

-

Highest group

2021 count

78

% of total

18.7%

Change from 2016

-

Data table

Household income quartiles for Lake Grace (S). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Regional WA.

Household income quartiles for Lake Grace (S). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Regional WA.
Household income quartiles for Lake Grace (S). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Regional WA.
Category20212016Change
Count%Regional WA%Count%Regional WA%Countpp
Lowest group9021.6%29.0%10024.2%29.1%--
Medium lowest12930.9%25.8%12430.0%25.9%--
Medium highest12028.8%24.5%11026.6%24.3%--
Highest group7818.7%20.7%7919.1%20.7%--
Total Households417100.0%100.0%413100.0%100.0%--