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 Old Guildford, accounting for 16.7% (477 people). This share was lower than Fairfield (C) (18.4%). Since 2016, the biggest change was in Secondary schoolers (12 to 17), which increased by 56 people and 1.4 percentage points.
Section overview
Age structure - Service age groups
Old Guildford - Total persons (Usual residence)
This table summarises service age groups for Old Guildford in 2021 for persons, with comparison against Fairfield (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Old Guildford, with comparison markers for Fairfield (C).
Babies and pre-schoolers (0 to 4)
2021 count
247
% of total
8.6%
Change from 2016
-1.8pp
247
8.6%
-1.8pp
Primary schoolers (5 to 11)
2021 count
356
% of total
12.5%
Change from 2016
-0.7pp
356
12.5%
-0.7pp
Secondary schoolers (12 to 17)
2021 count
272
% of total
9.5%
Change from 2016
+1.4pp
272
9.5%
+1.4pp
Tertiary education and independence (18 to 24)
2021 count
337
% of total
11.8%
Change from 2016
0.0pp
337
11.8%
0.0pp
Young workforce (25 to 34)
2021 count
467
% of total
16.3%
Change from 2016
-0.6pp
467
16.3%
-0.6pp
Parents and homebuilders (35 to 49)
2021 count
477
% of total
16.7%
Change from 2016
+0.1pp
477
16.7%
+0.1pp
Older workers and pre-retirees (50 to 59)
2021 count
274
% of total
9.6%
Change from 2016
-0.6pp
274
9.6%
-0.6pp
Empty nesters and retirees (60 to 69)
2021 count
217
% of total
7.6%
Change from 2016
+0.7pp
217
7.6%
+0.7pp
Seniors (70 to 84)
2021 count
161
% of total
5.6%
Change from 2016
+1.1pp
161
5.6%
+1.1pp
Elderly aged (85 and over)
2021 count
36
% of total
1.3%
Change from 2016
+0.2pp
36
1.3%
+0.2pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-29
-1.8pp
Primary schoolers (5 to 11)
+5
-0.7pp
Secondary schoolers (12 to 17)
+56
+1.4pp
Tertiary education and independence (18 to 24)
+24
0.0pp
Young workforce (25 to 34)
+18
-0.6pp
Parents and homebuilders (35 to 49)
+34
+0.1pp
Older workers and pre-retirees (50 to 59)
+2
-0.6pp
Empty nesters and retirees (60 to 69)
+32
+0.7pp
Seniors (70 to 84)
+42
+1.1pp
Elderly aged (85 and over)
+6
+0.2pp
Data table
Service age groups for Old Guildford. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Fairfield (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Fairfield (C)% | Count | % | Fairfield (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 247 | 8.6% | 5.2% | 276 | 10.4% | 6.1% | -29 | -1.8pp |
| Primary schoolers (5 to 11) | 356 | 12.5% | 8.6% | 351 | 13.2% | 9.0% | +5 | -0.7pp |
| Secondary schoolers (12 to 17) | 272 | 9.5% | 8.2% | 216 | 8.1% | 8.2% | +56 | +1.4pp |
| Tertiary education and independence (18 to 24) | 337 | 11.8% | 9.9% | 313 | 11.8% | 10.7% | +24 | 0.0pp |
| Young workforce (25 to 34) | 467 | 16.3% | 13.0% | 449 | 16.9% | 13.6% | +18 | -0.6pp |
| Parents and homebuilders (35 to 49) | 477 | 16.7% | 18.4% | 443 | 16.6% | 19.3% | +34 | +0.1pp |
| Older workers and pre-retirees (50 to 59) | 274 | 9.6% | 13.4% | 272 | 10.2% | 13.6% | +2 | -0.6pp |
| Empty nesters and retirees (60 to 69) | 217 | 7.6% | 12.1% | 185 | 6.9% | 10.3% | +32 | +0.7pp |
| Seniors (70 to 84) | 161 | 5.6% | 9.2% | 119 | 4.5% | 7.4% | +42 | +1.1pp |
| Elderly aged (85 and over) | 36 | 1.3% | 2.1% | 30 | 1.1% | 1.8% | +6 | +0.2pp |
| Total | 2,857 | 100.0% | 100.0% | 2,663 | 100.0% | 100.0% | +194 | 0.0pp |