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 Port Lincoln (C), accounting for 17.3% (2,499 people). This share was higher than Regional SA (16.4%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 254 people and 1.5 percentage points.
Section overview
Age structure - Service age groups
Port Lincoln (C) - Total persons (Usual residence)
This table summarises service age groups for Port Lincoln (C) in 2021 for persons, with comparison against Regional SA and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Port Lincoln (C), with comparison markers for Regional SA.
Babies and pre-schoolers (0 to 4)
2021 count
829
% of total
5.8%
Change from 2016
-0.8pp
829
5.8%
-0.8pp
Primary schoolers (5 to 11)
2021 count
1,233
% of total
8.6%
Change from 2016
-0.5pp
1,233
8.6%
-0.5pp
Secondary schoolers (12 to 17)
2021 count
1,078
% of total
7.5%
Change from 2016
-0.2pp
1,078
7.5%
-0.2pp
Tertiary education and independence (18 to 24)
2021 count
1,106
% of total
7.7%
Change from 2016
+0.2pp
1,106
7.7%
+0.2pp
Young workforce (25 to 34)
2021 count
1,800
% of total
12.5%
Change from 2016
-0.1pp
1,800
12.5%
-0.1pp
Parents and homebuilders (35 to 49)
2021 count
2,499
% of total
17.3%
Change from 2016
-0.7pp
2,499
17.3%
-0.7pp
Older workers and pre-retirees (50 to 59)
2021 count
1,854
% of total
12.9%
Change from 2016
-0.5pp
1,854
12.9%
-0.5pp
Empty nesters and retirees (60 to 69)
2021 count
1,841
% of total
12.8%
Change from 2016
+1.0pp
1,841
12.8%
+1.0pp
Seniors (70 to 84)
2021 count
1,729
% of total
12.0%
Change from 2016
+1.5pp
1,729
12.0%
+1.5pp
Elderly aged (85 and over)
2021 count
432
% of total
3.0%
Change from 2016
+0.2pp
432
3.0%
+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)
-94
-0.8pp
Primary schoolers (5 to 11)
-53
-0.5pp
Secondary schoolers (12 to 17)
-6
-0.2pp
Tertiary education and independence (18 to 24)
+46
+0.2pp
Young workforce (25 to 34)
+29
-0.1pp
Parents and homebuilders (35 to 49)
-39
-0.7pp
Older workers and pre-retirees (50 to 59)
-36
-0.5pp
Empty nesters and retirees (60 to 69)
+188
+1.0pp
Seniors (70 to 84)
+254
+1.5pp
Elderly aged (85 and over)
+41
+0.2pp
Data table
Service age groups for Port Lincoln (C). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Regional SA.
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Regional SA% | Count | % | Regional SA% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 829 | 5.8% | 4.9% | 923 | 6.6% | 5.5% | -94 | -0.8pp |
| Primary schoolers (5 to 11) | 1,233 | 8.6% | 8.1% | 1,286 | 9.1% | 8.6% | -53 | -0.5pp |
| Secondary schoolers (12 to 17) | 1,078 | 7.5% | 7.0% | 1,084 | 7.7% | 7.2% | -6 | -0.2pp |
| Tertiary education and independence (18 to 24) | 1,106 | 7.7% | 6.5% | 1,060 | 7.5% | 6.8% | +46 | +0.2pp |
| Young workforce (25 to 34) | 1,800 | 12.5% | 10.5% | 1,771 | 12.6% | 10.4% | +29 | -0.1pp |
| Parents and homebuilders (35 to 49) | 2,499 | 17.3% | 16.4% | 2,538 | 18.0% | 17.8% | -39 | -0.7pp |
| Older workers and pre-retirees (50 to 59) | 1,854 | 12.9% | 13.9% | 1,890 | 13.4% | 14.6% | -36 | -0.5pp |
| Empty nesters and retirees (60 to 69) | 1,841 | 12.8% | 15.1% | 1,653 | 11.8% | 14.4% | +188 | +1.0pp |
| Seniors (70 to 84) | 1,729 | 12.0% | 14.7% | 1,475 | 10.5% | 12.1% | +254 | +1.5pp |
| Elderly aged (85 and over) | 432 | 3.0% | 2.8% | 391 | 2.8% | 2.7% | +41 | +0.2pp |
| Total | 14,404 | 100.0% | 100.0% | 14,064 | 100.0% | 100.0% | +340 | 0.0pp |