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RDA Northern TerritoryCommunity profile

Big Rivers

Five year age groups

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In 2021, the largest age group in Big Rivers was 30 to 34 year olds. The group that changed the most since 2016 was 0 to 4 year olds, decreasing by 380 people.

The Age Structure of Big Rivers provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Big Rivers's residential role and function and how it is likely to change in the future.

Five year age groups present a classic age profile of the population. Each age group covers exactly five years, which enables direct comparison between each group.

To get a more complete picture Big Rivers's Age Structure should be viewed in conjunction with Household Types and Dwelling Types.

Q:

Derived from the Census question:

'What is the person's date of birth or age?'

Age structure - Five year age groups
Big Rivers - Total persons (Usual residence)20212016Change
Five year age groups (years)Number%RDA Northern Territory %Number%RDA Northern Territory %2016 to 2021
0 to 41,3747.27.01,7549.27.7-380
5 to 91,5017.97.21,6198.57.4-118
10 to 141,4857.86.81,4667.76.6+19
15 to 191,3497.16.11,3947.36.2-45
20 to 241,6268.66.81,4727.77.3+154
25 to 291,7549.29.01,8129.59.5-58
30 to 341,7579.39.41,5378.19.3+220
35 to 391,4467.68.31,2406.57.9+206
40 to 441,1205.97.11,1025.87.3+18
45 to 491,0685.66.51,3297.07.2-261
50 to 541,1936.36.41,1686.16.5+25
55 to 599785.25.69965.25.6-18
60 to 648304.44.88144.34.5+16
65 to 696203.33.65753.03.2+45
70 to 744422.32.63722.01.9+70
75 to 792361.21.42291.21.1+7
80 to 841200.60.8950.50.5+25
85 and over710.40.5570.30.4+14
Total population18,970100.0100.019,031100.0100.0-61
Source: Australian Bureau of Statistics, Census of Population and Housing 2016 and 2021. Compiled and presented by .id (informed decisions).
Please refer to specific data notes for more information

Dominant groups

Analysis of the five year age groups of Big Rivers in 2021 compared to the RDA Northern Territory shows that there was a higher proportion of people in the younger age groups (under 15) and a lower proportion of people in the older age groups (65+).

Overall, 23.0% of the population was aged between 0 and 15, and 7.8% were aged 65 years and over, compared with 21.0% and 8.9% respectively for the RDA Northern Territory.

The major differences between the age structure of Big Rivers and the RDA Northern Territory were:

  • A larger percentage of persons aged 20 to 24 (8.6% compared to 6.8%)
  • A larger percentage of persons aged 10 to 14 (7.8% compared to 6.8%)
  • A larger percentage of persons aged 15 to 19 (7.1% compared to 6.1%)
  • A smaller percentage of persons aged 40 to 44 (5.9% compared to 7.1%)

Emerging groups

From 2016 to 2021, Big Rivers's population decreased by 61 people (0.3%). This represents an average annual population change of -0.06% per year over the period.

The largest changes in age structure in this area between 2016 and 2021 were in the age groups:

  • 0 to 4 (-380 persons)
  • 45 to 49 (-261 persons)
  • 30 to 34 (+220 persons)
  • 35 to 39 (+206 persons)

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