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 Sydenham (NSW), accounting for 34.5%.

Section overview

Household income quartiles

Sydenham (NSW) - Households (Enumerated)

This table summarises household income quartiles for Sydenham (NSW) in 2021 for persons, with comparison against Inner West (A) and change since 2016.

Household income quartiles snapshot

2021 distribution by category for Sydenham (NSW), with comparison markers for Inner West (A).

Sydenham (NSW)
Inner West (A)

Lowest group

2021 count

71

% of total

18.2%

Change from 2016

-

Medium lowest

2021 count

86

% of total

22.0%

Change from 2016

-

Medium highest

2021 count

99

% of total

25.3%

Change from 2016

-

Highest group

2021 count

135

% of total

34.5%

Change from 2016

-

Data table

Household income quartiles for Sydenham (NSW). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Inner West (A).

Household income quartiles for Sydenham (NSW). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Inner West (A).
Household income quartiles for Sydenham (NSW). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Inner West (A).
Category20212016Change
Count%Inner West (A)%Count%Inner West (A)%Countpp
Lowest group7118.2%17.7%6217.2%17.5%--
Medium lowest8622.0%20.5%7119.7%19.2%--
Medium highest9925.3%23.9%10027.7%25.5%--
Highest group13534.5%37.9%12835.5%37.8%--
Total Households391100.0%100.0%361100.0%100.0%--