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LEARN MORE ABOUT .idIn 2021, the largest age group in Northern Territory was 30 to 34 year olds. The group that changed the most since 1991 was 30 to 34 year olds, increasing by 21,952 people.
The Age Structure of Northern Territory provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Northern Territory'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 Northern Territory'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 | |||||||
|---|---|---|---|---|---|---|---|
| Northern Territory - Total persons (Usual residence) | 2021 | 1991 | Change | ||||
| Five year age groups (years) | Number | % | Australia % | Number | % | Australia % | 1991 to 2021 |
| 0 to 4 | 16,224 | 7.0 | 5.8 | 0 | -- | -- | +16,224 |
| 5 to 9 | 16,842 | 7.2 | 6.2 | 0 | -- | -- | +16,842 |
| 10 to 14 | 15,836 | 6.8 | 6.2 | 0 | -- | -- | +15,836 |
| 15 to 19 | 14,183 | 6.1 | 5.7 | 0 | -- | -- | +14,183 |
| 20 to 24 | 15,791 | 6.8 | 6.2 | 0 | -- | -- | +15,791 |
| 25 to 29 | 20,936 | 9.0 | 7.0 | 0 | -- | -- | +20,936 |
| 30 to 34 | 21,952 | 9.4 | 7.3 | 0 | -- | -- | +21,952 |
| 35 to 39 | 19,396 | 8.3 | 7.2 | 0 | -- | -- | +19,396 |
| 40 to 44 | 16,421 | 7.1 | 6.5 | 0 | -- | -- | +16,421 |
| 45 to 49 | 15,056 | 6.5 | 6.4 | 0 | -- | -- | +15,056 |
| 50 to 54 | 14,911 | 6.4 | 6.3 | 0 | -- | -- | +14,911 |
| 55 to 59 | 13,078 | 5.6 | 6.1 | 0 | -- | -- | +13,078 |
| 60 to 64 | 11,150 | 4.8 | 5.8 | 0 | -- | -- | +11,150 |
| 65 to 69 | 8,433 | 3.6 | 5.1 | 0 | -- | -- | +8,433 |
| 70 to 74 | 6,065 | 2.6 | 4.6 | 0 | -- | -- | +6,065 |
| 75 to 79 | 3,285 | 1.4 | 3.2 | 0 | -- | -- | +3,285 |
| 80 to 84 | 1,876 | 0.8 | 2.2 | 0 | -- | -- | +1,876 |
| 85 and over | 1,157 | 0.5 | 2.1 | 94 | 100.0 | 100.0 | +1,063 |
| Total population | 232,592 | 100.0 | 100.0 | 94 | 100.0 | 100.0 | +232,498 |
Dominant groups
Analysis of the five year age groups of Northern Territory in 2021 compared to Australia 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, 21.0% of the population was aged between 0 and 15, and 8.9% were aged 65 years and over, compared with 18.2% and 17.2% respectively for Australia.
The major differences between the age structure of Northern Territory and Australia were:
- A larger percentage of persons aged 30 to 34 (9.4% compared to 7.3%)
- A larger percentage of persons aged 25 to 29 (9.0% compared to 7.0%)
- A smaller percentage of persons aged 70 to 74 (2.6% compared to 4.6%)
- A smaller percentage of persons aged 75 to 79 (1.4% compared to 3.2%)
Emerging groups
From 1991 to 2021, Northern Territory's population increased by 232,498 people (247338.3%). This represents an average annual population change of 29.75% per year over the period.
The largest changes in age structure in this area between 1991 and 2021 were in the age groups:
- 30 to 34 (+21,952 persons)
- 25 to 29 (+20,936 persons)
- 35 to 39 (+19,396 persons)
- 5 to 9 (+16,842 persons)
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