Households
Household size
About this topic
Household size shows how many people live in each household. It is a basic but important measure of family life, dwelling use, and the way people share housing.
This topic helps indicate demand for different dwelling sizes and can reflect life-cycle patterns, cultural norms, and affordability pressures. It is best read with household type, age structure, and dwelling type, because changes in household size can happen for very different reasons.
Interpretation notes
- This counts the number of people usually resident in the dwelling, so it describes shared living arrangements rather than dwelling size.
- Household size should be read with bedrooms or dwelling structure before drawing conclusions about crowding or housing suitability.
Key insight
In 2021, two-person households was the most common household size among households in Blacktown (C), accounting for 24.8% (30,127 households). This share was lower than Greater Sydney (30.7%). Since 2016, the biggest change was in two-person households, which increased by 5,464 households and 0.4 percentage points.
Section overview
Household size
Blacktown (C) - Households (Enumerated)
This table summarises household size for Blacktown (C) in 2021 for persons, with comparison against Greater Sydney and change since 2016.
Household size snapshot
2021 distribution by category for Blacktown (C), with comparison markers for Greater Sydney.
Number Of Persons Usually Resident One
2021 count
19,260
% of total
15.9%
Change from 2016
+0.7pp
19,260
15.9%
+0.7pp
Number Of Persons Usually Resident Two
2021 count
30,127
% of total
24.8%
Change from 2016
+0.4pp
30,127
24.8%
+0.4pp
Number Of Persons Usually Resident Three
2021 count
24,690
% of total
20.3%
Change from 2016
+0.5pp
24,690
20.3%
+0.5pp
Number Of Persons Usually Resident Four
2021 count
27,598
% of total
22.7%
Change from 2016
+0.4pp
27,598
22.7%
+0.4pp
Number Of Persons Usually Resident Five
2021 count
11,768
% of total
9.7%
Change from 2016
-0.9pp
11,768
9.7%
-0.9pp
Number Of Persons Usually Resident Six Or More
2021 count
7,894
% of total
6.5%
Change from 2016
-1.2pp
7,894
6.5%
-1.2pp
Chart view
Household size change
Absolute change in category counts between 2016 and 2021.
Number Of Persons Usually Resident One
+3,898
+0.7pp
Number Of Persons Usually Resident Two
+5,464
+0.4pp
Number Of Persons Usually Resident Three
+4,650
+0.5pp
Number Of Persons Usually Resident Four
+5,037
+0.4pp
Number Of Persons Usually Resident Five
+1,044
-0.9pp
Number Of Persons Usually Resident Six Or More
+139
-1.2pp
Data table
Household size for Blacktown (C). Household size. 2021 and 2016 counts, percentages, and change compared with Greater Sydney.
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Greater Sydney% | Count | % | Greater Sydney% | Count | pp | |
| Number Of Persons Usually Resident One | 19,260 | 15.9% | 23.2% | 15,362 | 15.2% | 21.6% | +3,898 | +0.7pp |
| Number Of Persons Usually Resident Two | 30,127 | 24.8% | 30.7% | 24,663 | 24.4% | 29.9% | +5,464 | +0.4pp |
| Number Of Persons Usually Resident Three | 24,690 | 20.3% | 17.2% | 20,040 | 19.8% | 17.6% | +4,650 | +0.5pp |
| Number Of Persons Usually Resident Four | 27,598 | 22.7% | 17.3% | 22,561 | 22.3% | 18.1% | +5,037 | +0.4pp |
| Number Of Persons Usually Resident Five | 11,768 | 9.7% | 7.3% | 10,724 | 10.6% | 8.0% | +1,044 | -0.9pp |
| Number Of Persons Usually Resident Six Or More | 7,894 | 6.5% | 4.2% | 7,755 | 7.7% | 4.7% | +139 | -1.2pp |
| Total | 121,337 | 100.0% | 100.0% | 101,107 | 100.0% | 100.0% | +20,230 | 0.0pp |