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Demographics & Identity
3781, VIC · Postcode
👥 Demographics & Identity in 3781, VIC
Who lives here — how many people, how old they are, and how communities identify.
More than one in five residents in postcode 3781 are children, making it a notably young area. The population has grown to 4,638 people, and the typical resident is 36 years old, which is a little younger than the national figure.
Part of
LGA Cardinia
Capital Greater Melbourne
State Victoria
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📍 3781, VIC, Postcode
Where 3781, VIC sits — Total population
?
4,638
▲ +5.4%
1
10
100
1.0k
10k
100k
1–2: 1 area
2–2: 0 areas
2–4: 0 areas
4–5: 2 areas
5–8: 3 areas
8–12: 2 areas
12–19: 2 areas
19–29: 12 areas
29–44: 19 areas
44–67: 35 areas
67–102: 30 areas
102–155: 70 areas
155–237: 97 areas
237–360: 129 areas
360–549: 158 areas
549–836: 168 areas
836–1,273: 181 areas
1,273–1,938: 179 areas
1,938–2,951: 157 areas
2,951–4,493: 179 areas
4,493–6,842: 176 areas
6,842–10,418: 210 areas
10,418–15,865: 268 areas
15,865–24,158: 254 areas
24,158–36,786: 182 areas
36,786–56,016: 93 areas
56,016–85,299: 28 areas
85,299–129,888: 8 areas
All postcode areas, 2021. The marker is 3781, VIC — higher than 53% of areas.
Total population compared with the state and national average
3781, VIC 4,638
Cardinia
118,194
Victoria
6,503,491
Australia
25,422,788
Population
How many people, and the typical age.
The population grew by 5.4% since 2011, adding about 238 people. The typical age of 36 years has barely changed over the last decade.
4,638
▲ +5.4%
Higher than 53% of postcode areas.
4.3k
4.4k
4.5k
4.6k
4.7k
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
4,400
4,477
4,638
2011: 4,400
2016: 4,477
2021: 4,638
The number of people who usually live in the area, counted on Census night.
36 yrs
→ 0.0%
Younger than 86% of postcode areas.
32
34
36
38
40
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
36 yrs
36 yrs
36 yrs
2011: 36 yrs
2016: 36 yrs
2021: 36 yrs
Half the population is older than this age, and half younger.
Age profile
How the population splits across age groups.
Children under 15 make up 22.1% of the population, which is well above the national figure of 18.2%. This helps explain why the area is much younger than most, while those aged 65 and over are well below the state average at 11.1%.
11.1%
▲ +79.3%
Lower than 88% of postcode areas.
4.0%
6.0%
8.0%
10.0%
12.0%
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
6.2%
8.4%
11.1%
2011: 6.2%
2016: 8.4%
2021: 11.1%
Share of the population aged 65 years and over.
22.1%
▼ -4.5%
Higher than 88% of postcode areas.
22.0%
22.5%
23.0%
23.5%
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
23.2%
22.6%
22.1%
2011: 23.2%
2016: 22.6%
2021: 22.1%
Share of the population aged under 15 years.
3781, VIC splits fairly evenly between Young adults (25–44) (28%) and Older adults (45–64) (28%), with Children (0–14) at 22%.
Identity & relationships
First Nations identity and marital status.
De facto relationships are much more common here than in most areas, at 17.1%, which is well above the national figure of 11.5%. People of Aboriginal and Torres Strait Islander descent make up 1.1% of the population, about the same as the state average.
1.1%
▲ +19.2%
Lower than 72% of postcode areas.
0.8%
0.9%
1.0%
1.1%
1.2%
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
0.9%
1.1%
1.1%
2011: 0.9%
2016: 1.1%
2021: 1.1%
Share of people who identify as Aboriginal and/or Torres Strait Islander.
17.1%
▲ +25.4%
Higher than 87% of postcode areas.
13.0%
14.0%
15.0%
16.0%
17.0%
18.0%
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
13.6%
15.3%
17.1%
2011: 13.6%
2016: 15.3%
2021: 17.1%
Share of people aged 15+ who are in a de facto marriage (registered marriages excluded).
In 3781, VIC, the largest group is Married at 48%, followed by Never married (38%) and Divorced (9%).
Age & sex structure
Males
Females
85+
80–84
75–79
70–74
65–69
60–64
55–59
50–54
45–49
40–44
35–39
30–34
25–29
20–24
15–19
10–14
5–9
0–4
194
194
85+: 85+: 6 males; 85+: 23 females
80–84: 80–84: 26 males; 80–84: 15 females
75–79: 75–79: 33 males; 75–79: 36 females
70–74: 70–74: 69 males; 70–74: 76 females
65–69: 65–69: 116 males; 65–69: 99 females
60–64: 60–64: 138 males; 60–64: 153 females
55–59: 55–59: 164 males; 55–59: 154 females
50–54: 50–54: 149 males; 50–54: 173 females
45–49: 45–49: 155 males; 45–49: 194 females
40–44: 40–44: 161 males; 40–44: 162 females
35–39: 35–39: 180 males; 35–39: 167 females
30–34: 30–34: 169 males; 30–34: 180 females
25–29: 25–29: 139 males; 25–29: 129 females
20–24: 20–24: 127 males; 20–24: 99 females
15–19: 15–19: 167 males; 15–19: 141 females
10–14: 10–14: 169 males; 10–14: 164 females
5–9: 5–9: 191 males; 5–9: 164 females
0–4: 0–4: 172 males; 0–4: 174 females
Sources
Census of Population and Housing — Australian Bureau of Statistics, 2021 (CC BY 4.0 ).
Cite this page
Australian Bureau of Statistics. (2021). Demographics & Identity in 3781, VIC [Census of Population and Housing]. CensusAtlas, used under CC BY 4.0. https://censusatlas.au/region/poa/POA3781/3781-vic/topic/demographics-identity
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