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 Heights, accounting for 38.4% (153 households). This share was higher than Onkaparinga (C) (35.6%). Since 2016, the biggest change was in one-person households, which decreased by 280 households and 15.2 percentage points.
Section overview
Household size
Seaford Heights - Households (Enumerated)
This table summarises household size for Seaford Heights in 2021 for persons, with comparison against Onkaparinga (C) and change since 2016.
Household size snapshot
2021 distribution by category for Seaford Heights, with comparison markers for Onkaparinga (C).
Number Of Persons Usually Resident One
2021 count
69
% of total
17.3%
Change from 2016
-15.2pp
69
17.3%
-15.2pp
Number Of Persons Usually Resident Two
2021 count
153
% of total
38.4%
Change from 2016
+3.2pp
153
38.4%
+3.2pp
Number Of Persons Usually Resident Three
2021 count
80
% of total
20.1%
Change from 2016
+5.6pp
80
20.1%
+5.6pp
Number Of Persons Usually Resident Four
2021 count
68
% of total
17.1%
Change from 2016
+4.5pp
68
17.1%
+4.5pp
Number Of Persons Usually Resident Five
2021 count
25
% of total
6.3%
Change from 2016
+1.9pp
25
6.3%
+1.9pp
Number Of Persons Usually Resident Six Or More
2021 count
11
% of total
2.8%
Change from 2016
+2.2pp
11
2.8%
+2.2pp
Chart view
Household size change
Absolute change in category counts between 2016 and 2021.
Number Of Persons Usually Resident One
-280
-15.2pp
Number Of Persons Usually Resident Two
-225
+3.2pp
Number Of Persons Usually Resident Three
-76
+5.6pp
Number Of Persons Usually Resident Four
-67
+4.5pp
Number Of Persons Usually Resident Five
-22
+1.9pp
Number Of Persons Usually Resident Six Or More
+5
+2.2pp
Data table
Household size for Seaford Heights. 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 | 69 | 17.3% | 26.0% | 349 | 32.5% | 24.8% | -280 | -15.2pp |
| Number Of Persons Usually Resident Two | 153 | 38.4% | 35.6% | 378 | 35.2% | 35.6% | -225 | +3.2pp |
| Number Of Persons Usually Resident Three | 80 | 20.1% | 16.1% | 156 | 14.5% | 16.4% | -76 | +5.6pp |
| Number Of Persons Usually Resident Four | 68 | 17.1% | 14.7% | 135 | 12.6% | 15.5% | -67 | +4.5pp |
| Number Of Persons Usually Resident Five | 25 | 6.3% | 5.4% | 47 | 4.4% | 5.6% | -22 | +1.9pp |
| Number Of Persons Usually Resident Six Or More | 11 | 2.8% | 2.1% | 6 | 0.6% | 2.1% | +5 | +2.2pp |
| Total | 398 | 100.0% | 100.0% | 1,075 | 100.0% | 100.0% | -677 | 0.0pp |