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 Millars Well, accounting for 54.4%.

Section overview

Household income quartiles

Millars Well - Households (Enumerated)

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

Household income quartiles snapshot

2021 distribution by category for Millars Well, with comparison markers for Karratha (C).

Millars Well
Karratha (C)

Lowest group

2021 count

27

% of total

4.7%

Change from 2016

-

Medium lowest

2021 count

73

% of total

12.7%

Change from 2016

-

Medium highest

2021 count

162

% of total

28.2%

Change from 2016

-

Highest group

2021 count

312

% of total

54.4%

Change from 2016

-

Data table

Household income quartiles for Millars Well. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Karratha (C).

Household income quartiles for Millars Well. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Karratha (C).
Household income quartiles for Millars Well. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Karratha (C).
Category20212016Change
Count%Karratha (C)%Count%Karratha (C)%Countpp
Lowest group274.7%7.3%488.5%8.5%--
Medium lowest7312.7%13.4%8414.9%13.0%--
Medium highest16228.2%26.3%17431.0%28.6%--
Highest group31254.4%53.1%25645.6%50.0%--
Total Households574100.0%100.0%562100.0%100.0%--