Population
Service age groups
About this topic
Service age groups divide the population into broad life-stage bands such as children, young adults, working-age adults, and older people. The groupings are designed to reflect typical demand for age-based services and facilities rather than exact five-year cohorts.
This view is useful for planning childcare, schools, recreation, aged services, and other community infrastructure. It works best alongside five year age groups, household type, and dwelling data, which add more detail about who is living in an area and how needs may change over time.
Interpretation notes
- This is a derived grouping rather than a direct Census question, so the age bands are planning-oriented summaries built from standard age data.
- Percentages relate to the total population; use five year age groups when exact cohort detail matters.
Related topics
Key insight
In 2021, Parents and homebuilders (35 to 49) was the most common category among residents in Sandringham (Vic.), accounting for 19.4% (2,116 people). This share was similar to Bayside (C) (19.4%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 2,074 people and 2.5 percentage points.
Section overview
Age structure - Service age groups
Sandringham (Vic.) - Total persons (Usual residence)
This table summarises service age groups for Sandringham (Vic.) in 2021 for persons, with comparison against Bayside (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Sandringham (Vic.), with comparison markers for Bayside (C).
Babies and pre-schoolers (0 to 4)
2021 count
432
% of total
4.0%
Change from 2016
+1.6pp
432
4.0%
+1.6pp
Primary schoolers (5 to 11)
2021 count
864
% of total
7.9%
Change from 2016
-5.8pp
864
7.9%
-5.8pp
Secondary schoolers (12 to 17)
2021 count
841
% of total
7.7%
Change from 2016
+2.1pp
841
7.7%
+2.1pp
Tertiary education and independence (18 to 24)
2021 count
808
% of total
7.4%
Change from 2016
-3.5pp
808
7.4%
-3.5pp
Young workforce (25 to 34)
2021 count
855
% of total
7.8%
Change from 2016
+0.1pp
855
7.8%
+0.1pp
Parents and homebuilders (35 to 49)
2021 count
2,116
% of total
19.4%
Change from 2016
+2.5pp
2,116
19.4%
+2.5pp
Older workers and pre-retirees (50 to 59)
2021 count
1,754
% of total
16.1%
Change from 2016
-10.5pp
1,754
16.1%
-10.5pp
Empty nesters and retirees (60 to 69)
2021 count
1,411
% of total
12.9%
Change from 2016
+1.2pp
1,411
12.9%
+1.2pp
Seniors (70 to 84)
2021 count
1,374
% of total
12.6%
Change from 2016
+6.1pp
1,374
12.6%
+6.1pp
Elderly aged (85 and over)
2021 count
490
% of total
4.5%
Change from 2016
+4.5pp
490
4.5%
+4.5pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+426
+1.6pp
Primary schoolers (5 to 11)
+830
-5.8pp
Secondary schoolers (12 to 17)
+827
+2.1pp
Tertiary education and independence (18 to 24)
+781
-3.5pp
Young workforce (25 to 34)
+836
+0.1pp
Parents and homebuilders (35 to 49)
+2,074
+2.5pp
Older workers and pre-retirees (50 to 59)
+1,688
-10.5pp
Empty nesters and retirees (60 to 69)
+1,382
+1.2pp
Seniors (70 to 84)
+1,358
+6.1pp
Elderly aged (85 and over)
+490
+4.5pp
Data table
Service age groups for Sandringham (Vic.). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Bayside (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Bayside (C)% | Count | % | Bayside (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 432 | 4.0% | 4.4% | 6 | 2.4% | 5.1% | +426 | +1.6pp |
| Primary schoolers (5 to 11) | 864 | 7.9% | 8.6% | 34 | 13.7% | 9.7% | +830 | -5.8pp |
| Secondary schoolers (12 to 17) | 841 | 7.7% | 8.7% | 14 | 5.6% | 8.2% | +827 | +2.1pp |
| Tertiary education and independence (18 to 24) | 808 | 7.4% | 7.8% | 27 | 10.9% | 7.4% | +781 | -3.5pp |
| Young workforce (25 to 34) | 855 | 7.8% | 7.8% | 19 | 7.7% | 8.2% | +836 | +0.1pp |
| Parents and homebuilders (35 to 49) | 2,116 | 19.4% | 19.4% | 42 | 16.9% | 21.4% | +2,074 | +2.5pp |
| Older workers and pre-retirees (50 to 59) | 1,754 | 16.1% | 15.7% | 66 | 26.6% | 14.9% | +1,688 | -10.5pp |
| Empty nesters and retirees (60 to 69) | 1,411 | 12.9% | 12.1% | 29 | 11.7% | 11.5% | +1,382 | +1.2pp |
| Seniors (70 to 84) | 1,374 | 12.6% | 12.2% | 16 | 6.5% | 9.9% | +1,358 | +6.1pp |
| Elderly aged (85 and over) | 490 | 4.5% | 3.4% | 0 | 0.0% | 3.7% | +490 | +4.5pp |
| Total | 10,926 | 100.0% | 100.0% | 248 | 100.0% | 100.0% | +10,678 | 0.0pp |