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 Millars Well, accounting for 25% (525 people). This share was lower than Karratha (C) (27.4%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which decreased by 1,298 people, while its share rose by 0.8 percentage points.
Section overview
Age structure - Service age groups
Millars Well - Total persons (Usual residence)
This table summarises service age groups for Millars Well in 2021 for persons, with comparison against Karratha (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Millars Well, with comparison markers for Karratha (C).
Babies and pre-schoolers (0 to 4)
2021 count
212
% of total
10.1%
Change from 2016
+6.5pp
212
10.1%
+6.5pp
Primary schoolers (5 to 11)
2021 count
274
% of total
13.0%
Change from 2016
+3.6pp
274
13.0%
+3.6pp
Secondary schoolers (12 to 17)
2021 count
139
% of total
6.6%
Change from 2016
-5.3pp
139
6.6%
-5.3pp
Tertiary education and independence (18 to 24)
2021 count
168
% of total
8.0%
Change from 2016
-2.0pp
168
8.0%
-2.0pp
Young workforce (25 to 34)
2021 count
435
% of total
20.7%
Change from 2016
+15.1pp
435
20.7%
+15.1pp
Parents and homebuilders (35 to 49)
2021 count
525
% of total
25.0%
Change from 2016
+0.8pp
525
25.0%
+0.8pp
Older workers and pre-retirees (50 to 59)
2021 count
203
% of total
9.6%
Change from 2016
-7.5pp
203
9.6%
-7.5pp
Empty nesters and retirees (60 to 69)
2021 count
119
% of total
5.7%
Change from 2016
-3.0pp
119
5.7%
-3.0pp
Seniors (70 to 84)
2021 count
21
% of total
1.0%
Change from 2016
-6.5pp
21
1.0%
-6.5pp
Elderly aged (85 and over)
2021 count
0
% of total
0.0%
Change from 2016
-1.6pp
0
0.0%
-1.6pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-58
+6.5pp
Primary schoolers (5 to 11)
-434
+3.6pp
Secondary schoolers (12 to 17)
-757
-5.3pp
Tertiary education and independence (18 to 24)
-587
-2.0pp
Young workforce (25 to 34)
+17
+15.1pp
Parents and homebuilders (35 to 49)
-1,298
+0.8pp
Older workers and pre-retirees (50 to 59)
-1,083
-7.5pp
Empty nesters and retirees (60 to 69)
-535
-3.0pp
Seniors (70 to 84)
-544
-6.5pp
Elderly aged (85 and over)
-123
-1.6pp
Data table
Service age groups for Millars Well. 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) | 212 | 10.1% | 8.5% | 270 | 3.6% | 9.5% | -58 | +6.5pp |
| Primary schoolers (5 to 11) | 274 | 13.0% | 12.5% | 708 | 9.4% | 11.8% | -434 | +3.6pp |
| Secondary schoolers (12 to 17) | 139 | 6.6% | 8.1% | 896 | 11.9% | 6.9% | -757 | -5.3pp |
| Tertiary education and independence (18 to 24) | 168 | 8.0% | 7.0% | 755 | 10.0% | 7.8% | -587 | -2.0pp |
| Young workforce (25 to 34) | 435 | 20.7% | 18.5% | 418 | 5.6% | 21.3% | +17 | +15.1pp |
| Parents and homebuilders (35 to 49) | 525 | 25.0% | 27.4% | 1,823 | 24.2% | 26.3% | -1,298 | +0.8pp |
| Older workers and pre-retirees (50 to 59) | 203 | 9.6% | 11.1% | 1,286 | 17.1% | 11.0% | -1,083 | -7.5pp |
| Empty nesters and retirees (60 to 69) | 119 | 5.7% | 5.3% | 654 | 8.7% | 4.3% | -535 | -3.0pp |
| Seniors (70 to 84) | 21 | 1.0% | 1.5% | 565 | 7.5% | 1.0% | -544 | -6.5pp |
| Elderly aged (85 and over) | 0 | 0.0% | 0.0% | 123 | 1.6% | 0.1% | -123 | -1.6pp |
| Total | 2,104 | 100.0% | 100.0% | 7,520 | 100.0% | 100.0% | -5,416 | 0.0pp |