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 Baynton (WA), accounting for 28.7% (1,292 people). This share was higher than Karratha (C) (27.4%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 176 people and 2.8 percentage points.
Section overview
Age structure - Service age groups
Baynton (WA) - Total persons (Usual residence)
This table summarises service age groups for Baynton (WA) in 2021 for persons, with comparison against Karratha (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Baynton (WA), with comparison markers for Karratha (C).
Babies and pre-schoolers (0 to 4)
2021 count
428
% of total
9.5%
Change from 2016
-2.6pp
428
9.5%
-2.6pp
Primary schoolers (5 to 11)
2021 count
692
% of total
15.4%
Change from 2016
+1.1pp
692
15.4%
+1.1pp
Secondary schoolers (12 to 17)
2021 count
454
% of total
10.1%
Change from 2016
+2.7pp
454
10.1%
+2.7pp
Tertiary education and independence (18 to 24)
2021 count
258
% of total
5.7%
Change from 2016
-1.2pp
258
5.7%
-1.2pp
Young workforce (25 to 34)
2021 count
758
% of total
16.9%
Change from 2016
-4.2pp
758
16.9%
-4.2pp
Parents and homebuilders (35 to 49)
2021 count
1,292
% of total
28.7%
Change from 2016
+2.8pp
1,292
28.7%
+2.8pp
Older workers and pre-retirees (50 to 59)
2021 count
427
% of total
9.5%
Change from 2016
+0.9pp
427
9.5%
+0.9pp
Empty nesters and retirees (60 to 69)
2021 count
147
% of total
3.3%
Change from 2016
+0.2pp
147
3.3%
+0.2pp
Seniors (70 to 84)
2021 count
13
% of total
0.3%
Change from 2016
0.0pp
13
0.3%
0.0pp
Elderly aged (85 and over)
2021 count
0
% of total
0.0%
Change from 2016
0.0pp
0
0.0%
0.0pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-92
-2.6pp
Primary schoolers (5 to 11)
+75
+1.1pp
Secondary schoolers (12 to 17)
+135
+2.7pp
Tertiary education and independence (18 to 24)
-40
-1.2pp
Young workforce (25 to 34)
-151
-4.2pp
Parents and homebuilders (35 to 49)
+176
+2.8pp
Older workers and pre-retirees (50 to 59)
+55
+0.9pp
Empty nesters and retirees (60 to 69)
+13
+0.2pp
Seniors (70 to 84)
-1
0.0pp
Elderly aged (85 and over)
0
0.0pp
Data table
Service age groups for Baynton (WA). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Karratha (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Karratha (C)% | Count | % | Karratha (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 428 | 9.5% | 8.5% | 520 | 12.1% | 9.5% | -92 | -2.6pp |
| Primary schoolers (5 to 11) | 692 | 15.4% | 12.5% | 617 | 14.3% | 11.8% | +75 | +1.1pp |
| Secondary schoolers (12 to 17) | 454 | 10.1% | 8.1% | 319 | 7.4% | 6.9% | +135 | +2.7pp |
| Tertiary education and independence (18 to 24) | 258 | 5.7% | 7.0% | 298 | 6.9% | 7.8% | -40 | -1.2pp |
| Young workforce (25 to 34) | 758 | 16.9% | 18.5% | 909 | 21.1% | 21.3% | -151 | -4.2pp |
| Parents and homebuilders (35 to 49) | 1,292 | 28.7% | 27.4% | 1,116 | 25.9% | 26.3% | +176 | +2.8pp |
| Older workers and pre-retirees (50 to 59) | 427 | 9.5% | 11.1% | 372 | 8.6% | 11.0% | +55 | +0.9pp |
| Empty nesters and retirees (60 to 69) | 147 | 3.3% | 5.3% | 134 | 3.1% | 4.3% | +13 | +0.2pp |
| Seniors (70 to 84) | 13 | 0.3% | 1.5% | 14 | 0.3% | 1.0% | -1 | 0.0pp |
| Elderly aged (85 and over) | 0 | 0.0% | 0.0% | 0 | 0.0% | 0.1% | 0 | 0.0pp |
| Total | 4,496 | 100.0% | 100.0% | 4,306 | 100.0% | 100.0% | +190 | 0.0pp |