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 lowest household income quartile held the largest share among households with income in Yankalilla (DC), accounting for 34.7%.

Section overview

Household income quartiles

Yankalilla (DC) - Households (Enumerated)

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

Household income quartiles snapshot

2021 distribution by category for Yankalilla (DC), with comparison markers for Regional SA.

Yankalilla (DC)
Regional SA

Lowest group

2021 count

798

% of total

34.7%

Change from 2016

-

Medium lowest

2021 count

700

% of total

30.5%

Change from 2016

-

Medium highest

2021 count

486

% of total

21.2%

Change from 2016

-

Highest group

2021 count

313

% of total

13.6%

Change from 2016

-

Data table

Household income quartiles for Yankalilla (DC). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Regional SA.

Household income quartiles for Yankalilla (DC). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Regional SA.
Household income quartiles for Yankalilla (DC). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Regional SA.
Category20212016Change
Count%Regional SA%Count%Regional SA%Countpp
Lowest group79834.7%31.3%61532.0%29.5%--
Medium lowest70030.5%28.1%58330.4%27.9%--
Medium highest48621.2%23.2%44623.2%24.0%--
Highest group31313.6%17.5%27514.3%18.6%--
Total Households2,297100.0%100.0%1,919100.0%100.0%--