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 Guildford (NSW), accounting for 18.8% (4,529 people). This share was lower than Cumberland (A) (21%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 436 people and 0.5 percentage points.
Section overview
Age structure - Service age groups
Guildford (NSW) - Total persons (Usual residence)
This table summarises service age groups for Guildford (NSW) in 2021 for persons, with comparison against Cumberland (A) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Guildford (NSW), with comparison markers for Cumberland (A).
Babies and pre-schoolers (0 to 4)
2021 count
2,067
% of total
8.6%
Change from 2016
-0.4pp
2,067
8.6%
-0.4pp
Primary schoolers (5 to 11)
2021 count
2,470
% of total
10.3%
Change from 2016
-0.5pp
2,470
10.3%
-0.5pp
Secondary schoolers (12 to 17)
2021 count
1,995
% of total
8.3%
Change from 2016
+0.7pp
1,995
8.3%
+0.7pp
Tertiary education and independence (18 to 24)
2021 count
2,457
% of total
10.2%
Change from 2016
-0.7pp
2,457
10.2%
-0.7pp
Young workforce (25 to 34)
2021 count
4,279
% of total
17.8%
Change from 2016
-0.9pp
4,279
17.8%
-0.9pp
Parents and homebuilders (35 to 49)
2021 count
4,529
% of total
18.8%
Change from 2016
+0.5pp
4,529
18.8%
+0.5pp
Older workers and pre-retirees (50 to 59)
2021 count
2,409
% of total
10.0%
Change from 2016
-0.3pp
2,409
10.0%
-0.3pp
Empty nesters and retirees (60 to 69)
2021 count
2,090
% of total
8.7%
Change from 2016
+1.3pp
2,090
8.7%
+1.3pp
Seniors (70 to 84)
2021 count
1,465
% of total
6.1%
Change from 2016
+0.9pp
1,465
6.1%
+0.9pp
Elderly aged (85 and over)
2021 count
323
% of total
1.3%
Change from 2016
-0.4pp
323
1.3%
-0.4pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+50
-0.4pp
Primary schoolers (5 to 11)
+62
-0.5pp
Secondary schoolers (12 to 17)
+298
+0.7pp
Tertiary education and independence (18 to 24)
+31
-0.7pp
Young workforce (25 to 34)
+95
-0.9pp
Parents and homebuilders (35 to 49)
+436
+0.5pp
Older workers and pre-retirees (50 to 59)
+102
-0.3pp
Empty nesters and retirees (60 to 69)
+432
+1.3pp
Seniors (70 to 84)
+296
+0.9pp
Elderly aged (85 and over)
-51
-0.4pp
Data table
Service age groups for Guildford (NSW). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Cumberland (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Cumberland (A)% | Count | % | Cumberland (A)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 2,067 | 8.6% | 7.0% | 2,017 | 9.0% | 7.8% | +50 | -0.4pp |
| Primary schoolers (5 to 11) | 2,470 | 10.3% | 9.4% | 2,408 | 10.8% | 9.4% | +62 | -0.5pp |
| Secondary schoolers (12 to 17) | 1,995 | 8.3% | 6.7% | 1,697 | 7.6% | 6.6% | +298 | +0.7pp |
| Tertiary education and independence (18 to 24) | 2,457 | 10.2% | 10.1% | 2,426 | 10.9% | 10.4% | +31 | -0.7pp |
| Young workforce (25 to 34) | 4,279 | 17.8% | 18.5% | 4,184 | 18.7% | 19.5% | +95 | -0.9pp |
| Parents and homebuilders (35 to 49) | 4,529 | 18.8% | 21.0% | 4,093 | 18.3% | 19.9% | +436 | +0.5pp |
| Older workers and pre-retirees (50 to 59) | 2,409 | 10.0% | 10.6% | 2,307 | 10.3% | 10.8% | +102 | -0.3pp |
| Empty nesters and retirees (60 to 69) | 2,090 | 8.7% | 8.4% | 1,658 | 7.4% | 7.9% | +432 | +1.3pp |
| Seniors (70 to 84) | 1,465 | 6.1% | 6.8% | 1,169 | 5.2% | 6.0% | +296 | +0.9pp |
| Elderly aged (85 and over) | 323 | 1.3% | 1.5% | 374 | 1.7% | 1.5% | -51 | -0.4pp |
| Total | 24,091 | 100.0% | 100.0% | 22,331 | 100.0% | 100.0% | +1,760 | 0.0pp |