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National Growth Areas AllianceCommunity profile

National Growth Areas Alliance (NGAA)

Household size

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In 2021, 19% of households in National Growth Areas Alliance (NGAA) contained only one person, compared with 15.6% in the City of Casey , with the most dominant household size being 2 persons per household.

The size of households in general follows the life-cycle of families. Households are usually small at the stage of relationship formation (early marriage), and then increase in size with the advent of children. They later reduce in size again as these children reach adulthood and leave home. Household size can also be influenced by a lack (or abundance) of affordable housing. Overseas migrants and indigenous persons often have a tradition of living with extended family members which significantly affects household size.

Household size in Australia has generally declined since the 1970s, but the rate of decline has slowed in recent years.

An increasing household size in an area may indicate a lack of affordable housing opportunities for young people, an increase in the birth rate or an increase in family formation in the area. A declining household size may indicate children leaving the area when they leave home, an increase in retirees settling in the area, or an attraction of young singles and couples to the area.

For greater insight, National Growth Areas Alliance (NGAA)'s Household Size data should be viewed in conjunction with Household Summary, Age Structure, Dwelling Type, Household Income and Language Spoken at Home.

Q:

Derived from the three Census questions:

'Name of each person including visitors who spent the night of Tuesday, 10 August 2021 in this dwelling', and 'Where does the person usually live?', and 'Name of each person who usually lives in this dwelling but was away on Tuesday, 10 August 2021.'

Household size
National Growth Areas Alliance (NGAA) - Households (Enumerated)20212016Change
Number of persons usually residentNumber%City of Casey %Number%City of Casey %2016 to 2021
1 person332,67419.315.6260,18718.115.3+72,487
2 persons508,36029.526.5427,51029.726.9+80,850
3 persons314,86018.319.5263,41118.318.9+51,449
4 persons332,19619.322.2280,38819.522.4+51,808
5 persons146,6858.59.7127,4278.99.9+19,258
6 or more persons90,1295.26.578,2435.46.6+11,886
Total classifiable households1,724,904100.0100.01,437,166100.0100.0+287,738
Source: Australian Bureau of Statistics, Census of Population and Housing 2016 and 2021. Compiled and presented by .id (informed decisions).
Please refer to specific data notes for more information
Household size - Summary
National Growth Areas Alliance (NGAA) - Enumerated20212016Change
DwellingsNumber%City of Casey %Number%City of Casey %2016 to 2021
Occupied private dwellings1,801,411----1,512,475----+288,936
Persons in occupied private dwellings5,115,491----4,345,866----+769,625
Average household size (persons per dwelling)2.84--3.062.87--3.06-0.03
Source: Australian Bureau of Statistics, Census of Population and Housing 2016 and 2021. Compiled and presented in profile.id by .id (informed decisions).
Please refer to specific data notes for more information

The 'Dwellings' table is enumerated data.

Dominant groups

Analysis of the number of persons usually resident in a household in National Growth Areas Alliance (NGAA) compared with the City of Casey shows that there were a higher proportion of lone person households, and a lower proportion of larger households (those with 4 persons or more). Overall there were 19.3% of lone person households, and 33.0% of larger households, compared with 15.6% and 38.4% respectively for the City of Casey .

The major differences in the household size for National Growth Areas Alliance (NGAA) and the City of Casey were:

  • A larger percentage of households with 1 person usually resident (19.3% compared to 15.6%)
  • A larger percentage of households with 2 persons usually resident (29.5% compared to 26.5%)
  • A smaller percentage of households with 4 persons usually resident (19.3% compared to 22.2%)
  • A smaller percentage of households with 6 or more persons usually resident (5.2% compared to 6.5%)

Emerging groups

The number of households in National Growth Areas Alliance (NGAA) increased by 287,738 between 2016 and 2021.

The largest changes in the number of persons usually resident in a household in National Growth Areas Alliance (NGAA) between 2016 and 2021 were:

  • 2 persons (+80,850 households)
  • 1 person (+72,487 households)
  • 4 persons (+51,808 households)
  • 3 persons (+51,449 households)

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