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 Seaford (SA), accounting for 35.7% (652 households). This share was similar to Onkaparinga (C) (35.6%). Since 2016, the biggest change was in two-person households, which increased by 602 households, while its share fell by 7 percentage points.
Section overview
Household size
Seaford (SA) - Households (Enumerated)
This table summarises household size for Seaford (SA) in 2021 for persons, with comparison against Onkaparinga (C) and change since 2016.
Household size snapshot
2021 distribution by category for Seaford (SA), with comparison markers for Onkaparinga (C).
Number Of Persons Usually Resident One
2021 count
544
% of total
29.8%
Change from 2016
+14.4pp
544
29.8%
+14.4pp
Number Of Persons Usually Resident Two
2021 count
652
% of total
35.7%
Change from 2016
-7.0pp
652
35.7%
-7.0pp
Number Of Persons Usually Resident Three
2021 count
269
% of total
14.7%
Change from 2016
-5.0pp
269
14.7%
-5.0pp
Number Of Persons Usually Resident Four
2021 count
260
% of total
14.2%
Change from 2016
-4.6pp
260
14.2%
-4.6pp
Number Of Persons Usually Resident Five
2021 count
83
% of total
4.5%
Change from 2016
-1.5pp
83
4.5%
-1.5pp
Number Of Persons Usually Resident Six Or More
2021 count
21
% of total
1.2%
Change from 2016
-1.4pp
21
1.2%
-1.4pp
Chart view
Household size change
Absolute change in category counts between 2016 and 2021.
Number Of Persons Usually Resident One
+526
+14.4pp
Number Of Persons Usually Resident Two
+602
-7.0pp
Number Of Persons Usually Resident Three
+246
-5.0pp
Number Of Persons Usually Resident Four
+238
-4.6pp
Number Of Persons Usually Resident Five
+76
-1.5pp
Number Of Persons Usually Resident Six Or More
+18
-1.4pp
Data table
Household size for Seaford (SA). Household size. 2021 and 2016 counts, percentages, and change compared with Onkaparinga (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Onkaparinga (C)% | Count | % | Onkaparinga (C)% | Count | pp | |
| Number Of Persons Usually Resident One | 544 | 29.8% | 26.0% | 18 | 15.4% | 24.8% | +526 | +14.4pp |
| Number Of Persons Usually Resident Two | 652 | 35.7% | 35.6% | 50 | 42.7% | 35.6% | +602 | -7.0pp |
| Number Of Persons Usually Resident Three | 269 | 14.7% | 16.1% | 23 | 19.7% | 16.4% | +246 | -5.0pp |
| Number Of Persons Usually Resident Four | 260 | 14.2% | 14.7% | 22 | 18.8% | 15.5% | +238 | -4.6pp |
| Number Of Persons Usually Resident Five | 83 | 4.5% | 5.4% | 7 | 6.0% | 5.6% | +76 | -1.5pp |
| Number Of Persons Usually Resident Six Or More | 21 | 1.2% | 2.1% | 3 | 2.6% | 2.1% | +18 | -1.4pp |
| Total | 1,826 | 100.0% | 100.0% | 117 | 100.0% | 100.0% | +1,709 | 0.0pp |