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 Black Rock (Vic.), accounting for 37.4% (930 households). This share was higher than Bayside (C) (32.6%). Since 2016, the biggest change was in one-person households, which decreased by 630 households and 0.4 percentage points.
Section overview
Household size
Black Rock (Vic.) - Households (Enumerated)
This table summarises household size for Black Rock (Vic.) in 2021 for persons, with comparison against Bayside (C) and change since 2016.
Household size snapshot
2021 distribution by category for Black Rock (Vic.), with comparison markers for Bayside (C).
Number Of Persons Usually Resident One
2021 count
605
% of total
24.3%
Change from 2016
-0.4pp
605
24.3%
-0.4pp
Number Of Persons Usually Resident Two
2021 count
930
% of total
37.4%
Change from 2016
+6.7pp
930
37.4%
+6.7pp
Number Of Persons Usually Resident Three
2021 count
340
% of total
13.7%
Change from 2016
-1.6pp
340
13.7%
-1.6pp
Number Of Persons Usually Resident Four
2021 count
421
% of total
16.9%
Change from 2016
-2.1pp
421
16.9%
-2.1pp
Number Of Persons Usually Resident Five
2021 count
164
% of total
6.6%
Change from 2016
-1.1pp
164
6.6%
-1.1pp
Number Of Persons Usually Resident Six Or More
2021 count
32
% of total
1.3%
Change from 2016
-1.3pp
32
1.3%
-1.3pp
Chart view
Household size change
Absolute change in category counts between 2016 and 2021.
Number Of Persons Usually Resident One
-630
-0.4pp
Number Of Persons Usually Resident Two
-607
+6.7pp
Number Of Persons Usually Resident Three
-425
-1.6pp
Number Of Persons Usually Resident Four
-531
-2.1pp
Number Of Persons Usually Resident Five
-219
-1.1pp
Number Of Persons Usually Resident Six Or More
-99
-1.3pp
Data table
Household size for Black Rock (Vic.). Household size. 2021 and 2016 counts, percentages, and change compared with Bayside (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Bayside (C)% | Count | % | Bayside (C)% | Count | pp | |
| Number Of Persons Usually Resident One | 605 | 24.3% | 25.3% | 1,235 | 24.7% | 24.4% | -630 | -0.4pp |
| Number Of Persons Usually Resident Two | 930 | 37.4% | 32.6% | 1,537 | 30.7% | 31.6% | -607 | +6.7pp |
| Number Of Persons Usually Resident Three | 340 | 13.7% | 15.2% | 765 | 15.3% | 15.2% | -425 | -1.6pp |
| Number Of Persons Usually Resident Four | 421 | 16.9% | 18.8% | 952 | 19.0% | 19.7% | -531 | -2.1pp |
| Number Of Persons Usually Resident Five | 164 | 6.6% | 6.7% | 383 | 7.7% | 7.4% | -219 | -1.1pp |
| Number Of Persons Usually Resident Six Or More | 32 | 1.3% | 1.4% | 131 | 2.6% | 1.7% | -99 | -1.3pp |
| Total | 2,486 | 100.0% | 100.0% | 5,000 | 100.0% | 100.0% | -2,514 | 0.0pp |