Derby · Suburb / Locality

Family & Households in Derby

How families and households are made up across the area.

More people are living alone in Derby than in most similar areas. This trend is part of a broader shift in the community, where one-parent families are now far more common than the national figure.

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📍 Derby, Suburb / Locality

Where Derby sits — Average household size

2.5 ▼ -10.7%
  • 1.5–1.6: 490 areas
  • 1.6–1.8: 168 areas
  • 1.8–1.9: 642 areas
  • 1.9–2.1: 816 areas
  • 2.1–2.2: 1854 areas
  • 2.2–2.4: 1319 areas
  • 2.4–2.5: 2753 areas
  • 2.5–2.7: 1349 areas
  • 2.7–2.8: 2332 areas
  • 2.8–3.0: 805 areas
  • 3.0–3.1: 1044 areas
  • 3.1–3.3: 289 areas
  • 3.3–3.4: 386 areas
  • 3.4–3.6: 110 areas
  • 3.6–3.7: 85 areas
  • 3.7–3.9: 40 areas
  • 3.9–4.0: 258 areas

All suburb / locality areas, 2021. The marker is Derby — higher than 50% of areas.

Average household size compared with the state and national average
Derby2.5
6728, WA 2.8
Western Australia 2.5
Australia 2.5

Households

Average household size.

About 34.9% of residents live alone, which is well above the 25.6% national figure. Despite this, the typical home in Derby still holds 2.5 people, matching both the state and national average.

2.5 ▼ -10.7%

Higher than 50% of suburb / locality areas.

  • 2011: 2.8
  • 2016: 2.6
  • 2021: 2.5

Average number of people usually resident per household.

34.9% ▲ +25.3%

Higher than 84% of suburb / locality areas.

  • 2011: 27.9%
  • 2016: 30.7%
  • 2021: 34.9%

Share of households that are a single person living alone.

Household size

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Derby splits fairly evenly between 1 person (35%) and 2 people (31%), with 3 people at 11%.

Families

Family types and one-parent families.

One-parent families make up 24.2% of the community, a figure far above the 14.1% seen across Australia. Couples with children are the most common family type at 45.9%.

24.2% ▲ +21.5%

Higher than 91% of suburb / locality areas.

  • 2011: 19.9%
  • 2016: 23.0%
  • 2021: 24.2%

Share of people who live in one-parent families.

Family composition

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In Derby, the largest group is Couples with children at 46%, followed by Couples without children (27%) and One-parent families (24%).

Sources

  • Census of Population and Housing — Australian Bureau of Statistics, 2021 (CC BY 4.0).

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Cite this page

Australian Bureau of Statistics. (2021). Family & Households in Derby [Census of Population and Housing]. CensusAtlas, used under CC BY 4.0. https://censusatlas.au/region/sal/SAL50405/derby/topic/family-households