Population
Five year age groups
About this topic
Five year age groups show the population in standard five-year cohorts from early childhood through older age. Because each band covers the same span of years, the topic gives a clear and comparable view of an area's age structure.
This topic is useful for identifying growth or decline in specific cohorts and for comparing age patterns across places and over time. For service planning, it is often read together with service age groups, household types, and dwelling types.
Interpretation notes
- Age is reported as at Census night, so the counts are a snapshot of the resident age structure at that point in time.
- Because each band covers the same five-year span, this topic is best for exact cohort comparison rather than service-planning life stages.
Related topics
Key insight
In 2021, 5 to 9 year olds was the largest age group among residents in Bridgewater (Tas.), accounting for 8.8% (404 people). This share was higher than Brighton (M) (8%). Since 2016, the biggest change was in 25 to 29 year olds, which increased by 126 people and 2.1 percentage points.
Section overview
Age structure - Five year age groups
Bridgewater (Tas.) - Total persons (Usual residence)
This table summarises five year age groups for Bridgewater (Tas.) in 2021 for persons, with comparison against Brighton (M) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Bridgewater (Tas.), with comparison markers for Brighton (M).
0 to 4
2021 count
347
% of total
7.6%
Change from 2016
-0.9pp
347
7.6%
-0.9pp
5 to 9
2021 count
404
% of total
8.8%
Change from 2016
-0.8pp
404
8.8%
-0.8pp
10 to 14
2021 count
369
% of total
8.0%
Change from 2016
-0.3pp
369
8.0%
-0.3pp
15 to 19
2021 count
301
% of total
6.6%
Change from 2016
-1.0pp
301
6.6%
-1.0pp
20 to 24
2021 count
343
% of total
7.5%
Change from 2016
+0.7pp
343
7.5%
+0.7pp
25 to 29
2021 count
343
% of total
7.5%
Change from 2016
+2.1pp
343
7.5%
+2.1pp
30 to 34
2021 count
328
% of total
7.1%
Change from 2016
+1.4pp
328
7.1%
+1.4pp
35 to 39
2021 count
248
% of total
5.4%
Change from 2016
-0.7pp
248
5.4%
-0.7pp
40 to 44
2021 count
249
% of total
5.4%
Change from 2016
-0.2pp
249
5.4%
-0.2pp
45 to 49
2021 count
256
% of total
5.6%
Change from 2016
0.0pp
256
5.6%
0.0pp
50 to 54
2021 count
253
% of total
5.5%
Change from 2016
+0.3pp
253
5.5%
+0.3pp
55 to 59
2021 count
204
% of total
4.4%
Change from 2016
-1.1pp
204
4.4%
-1.1pp
60 to 64
2021 count
234
% of total
5.1%
Change from 2016
-2.0pp
234
5.1%
-2.0pp
65 to 69
2021 count
254
% of total
5.5%
Change from 2016
-1.0pp
254
5.5%
-1.0pp
70 to 74
2021 count
223
% of total
4.9%
Change from 2016
+1.0pp
223
4.9%
+1.0pp
75 to 79
2021 count
95
% of total
2.1%
Change from 2016
+0.1pp
95
2.1%
+0.1pp
80 to 84
2021 count
58
% of total
1.3%
Change from 2016
+0.4pp
58
1.3%
+0.4pp
85 and over
2021 count
20
% of total
0.4%
Change from 2016
-0.2pp
20
0.4%
-0.2pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+4
-0.9pp
5 to 9
+15
-0.8pp
10 to 14
+34
-0.3pp
15 to 19
-6
-1.0pp
20 to 24
+69
+0.7pp
25 to 29
+126
+2.1pp
30 to 34
+98
+1.4pp
35 to 39
+3
-0.7pp
40 to 44
+24
-0.2pp
45 to 49
+30
0.0pp
50 to 54
+43
+0.3pp
55 to 59
-19
-1.1pp
60 to 64
-52
-2.0pp
65 to 69
-10
-1.0pp
70 to 74
+66
+1.0pp
75 to 79
+14
+0.1pp
80 to 84
+22
+0.4pp
85 and over
-4
-0.2pp
Data table
Five year age groups for Bridgewater (Tas.). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Brighton (M).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Brighton (M)% | Count | % | Brighton (M)% | Count | pp | |
| 0 to 4 | 347 | 7.6% | 7.1% | 343 | 8.5% | 8.0% | +4 | -0.9pp |
| 5 to 9 | 404 | 8.8% | 8.0% | 389 | 9.6% | 8.3% | +15 | -0.8pp |
| 10 to 14 | 369 | 8.0% | 7.6% | 335 | 8.3% | 7.3% | +34 | -0.3pp |
| 15 to 19 | 301 | 6.6% | 6.0% | 307 | 7.6% | 7.0% | -6 | -1.0pp |
| 20 to 24 | 343 | 7.5% | 6.6% | 274 | 6.8% | 6.6% | +69 | +0.7pp |
| 25 to 29 | 343 | 7.5% | 7.4% | 217 | 5.4% | 6.5% | +126 | +2.1pp |
| 30 to 34 | 328 | 7.1% | 7.4% | 230 | 5.7% | 6.7% | +98 | +1.4pp |
| 35 to 39 | 248 | 5.4% | 6.6% | 245 | 6.1% | 6.4% | +3 | -0.7pp |
| 40 to 44 | 249 | 5.4% | 6.0% | 225 | 5.6% | 6.7% | +24 | -0.2pp |
| 45 to 49 | 256 | 5.6% | 6.1% | 226 | 5.6% | 6.5% | +30 | 0.0pp |
| 50 to 54 | 253 | 5.5% | 6.2% | 210 | 5.2% | 5.9% | +43 | +0.3pp |
| 55 to 59 | 204 | 4.4% | 5.6% | 223 | 5.5% | 6.3% | -19 | -1.1pp |
| 60 to 64 | 234 | 5.1% | 5.4% | 286 | 7.1% | 6.0% | -52 | -2.0pp |
| 65 to 69 | 254 | 5.5% | 5.2% | 264 | 6.5% | 4.8% | -10 | -1.0pp |
| 70 to 74 | 223 | 4.9% | 4.0% | 157 | 3.9% | 3.1% | +66 | +1.0pp |
| 75 to 79 | 95 | 2.1% | 2.6% | 81 | 2.0% | 2.1% | +14 | +0.1pp |
| 80 to 84 | 58 | 1.3% | 1.4% | 36 | 0.9% | 1.1% | +22 | +0.4pp |
| 85 and over | 20 | 0.4% | 0.9% | 24 | 0.6% | 0.8% | -4 | -0.2pp |
| Total | 4,592 | 100.0% | 100.0% | 4,045 | 100.0% | 100.0% | +547 | 0.0pp |