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, Seniors (70 to 84) was the most common category among residents in Tottenham (NSW), accounting for 20% (90 people). This share was higher than Lachlan (A) (11.9%). Since 2016, the biggest change was in Elderly aged (85 and over), which increased by 16 people and 3.6 percentage points.
Section overview
Age structure - Service age groups
Tottenham (NSW) - Total persons (Usual residence)
This table summarises service age groups for Tottenham (NSW) in 2021 for persons, with comparison against Lachlan (A) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Tottenham (NSW), with comparison markers for Lachlan (A).
Babies and pre-schoolers (0 to 4)
2021 count
22
% of total
4.9%
Change from 2016
0.0pp
22
4.9%
0.0pp
Primary schoolers (5 to 11)
2021 count
27
% of total
6.0%
Change from 2016
-3.3pp
27
6.0%
-3.3pp
Secondary schoolers (12 to 17)
2021 count
19
% of total
4.2%
Change from 2016
+0.9pp
19
4.2%
+0.9pp
Tertiary education and independence (18 to 24)
2021 count
17
% of total
3.8%
Change from 2016
0.0pp
17
3.8%
0.0pp
Young workforce (25 to 34)
2021 count
51
% of total
11.3%
Change from 2016
+1.8pp
51
11.3%
+1.8pp
Parents and homebuilders (35 to 49)
2021 count
70
% of total
15.5%
Change from 2016
+0.5pp
70
15.5%
+0.5pp
Older workers and pre-retirees (50 to 59)
2021 count
58
% of total
12.9%
Change from 2016
-0.6pp
58
12.9%
-0.6pp
Empty nesters and retirees (60 to 69)
2021 count
57
% of total
12.6%
Change from 2016
-3.1pp
57
12.6%
-3.1pp
Seniors (70 to 84)
2021 count
90
% of total
20.0%
Change from 2016
+1.9pp
90
20.0%
+1.9pp
Elderly aged (85 and over)
2021 count
31
% of total
6.9%
Change from 2016
+3.6pp
31
6.9%
+3.6pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
0
0.0pp
Primary schoolers (5 to 11)
-15
-3.3pp
Secondary schoolers (12 to 17)
+4
+0.9pp
Tertiary education and independence (18 to 24)
0
0.0pp
Young workforce (25 to 34)
+8
+1.8pp
Parents and homebuilders (35 to 49)
+2
+0.5pp
Older workers and pre-retirees (50 to 59)
-3
-0.6pp
Empty nesters and retirees (60 to 69)
-14
-3.1pp
Seniors (70 to 84)
+8
+1.9pp
Elderly aged (85 and over)
+16
+3.6pp
Data table
Service age groups for Tottenham (NSW). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Lachlan (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Lachlan (A)% | Count | % | Lachlan (A)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 22 | 4.9% | 6.6% | 22 | 4.9% | 8.0% | 0 | 0.0pp |
| Primary schoolers (5 to 11) | 27 | 6.0% | 11.0% | 42 | 9.3% | 10.1% | -15 | -3.3pp |
| Secondary schoolers (12 to 17) | 19 | 4.2% | 7.1% | 15 | 3.3% | 6.8% | +4 | +0.9pp |
| Tertiary education and independence (18 to 24) | 17 | 3.8% | 6.2% | 17 | 3.8% | 7.7% | 0 | 0.0pp |
| Young workforce (25 to 34) | 51 | 11.3% | 11.6% | 43 | 9.5% | 12.0% | +8 | +1.8pp |
| Parents and homebuilders (35 to 49) | 70 | 15.5% | 17.1% | 68 | 15.0% | 15.6% | +2 | +0.5pp |
| Older workers and pre-retirees (50 to 59) | 58 | 12.9% | 11.8% | 61 | 13.5% | 13.3% | -3 | -0.6pp |
| Empty nesters and retirees (60 to 69) | 57 | 12.6% | 13.6% | 71 | 15.7% | 12.1% | -14 | -3.1pp |
| Seniors (70 to 84) | 90 | 20.0% | 11.9% | 82 | 18.1% | 11.9% | +8 | +1.9pp |
| Elderly aged (85 and over) | 31 | 6.9% | 3.4% | 15 | 3.3% | 2.7% | +16 | +3.6pp |
| Total | 451 | 100.0% | 100.0% | 453 | 100.0% | 100.0% | -2 | 0.0pp |