Northern Beaches Council area
Five year age groups
In 2021, the largest age group in the Northern Beaches Council area was 45 to 49 year olds. The group that changed the most since 2006 was 50 to 54 year olds, increasing by 5,397 people.
The Age Structure of the Northern Beaches Council area provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of the Northern Beaches Council area'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 the Northern Beaches Council area's Age Structure should be viewed in conjunction with Household Types and Dwelling Types.
Derived from the Census question:
'What is the person's date of birth or age?'
Total population
| Age structure - Five year age groups | ||||||||
|---|---|---|---|---|---|---|---|---|
| Northern Beaches Council area - Total persons (Enumerated) | 2021 | 2006 | Change | |||||
| Five year age groups (years) | Number | % | Collaroy Plateau % | Number | % | Collaroy Plateau % | 2006 to 2021 | |
| 0 to 4 | 14,041 | 5.4 | 5.9 | 14,987 | 6.8 | 8.0 | -947 | 2001 |
| 5 to 9 | 16,102 | 6.2 | 8.3 | 14,077 | 6.4 | 8.7 | +2,025 | 2002 |
| 10 to 14 | 18,116 | 7.0 | 8.0 | 13,436 | 6.1 | 7.1 | +4,680 | 2003 |
| 15 to 19 | 16,161 | 6.2 | 8.1 | 12,891 | 5.8 | 7.5 | +3,269 | 2004 |
| 20 to 24 | 13,639 | 5.2 | 6.0 | 11,938 | 5.4 | 4.8 | +1,700 | 2005 |
| 25 to 29 | 13,203 | 5.1 | 3.3 | 13,436 | 6.1 | 4.2 | -233 | 2006 |
| 30 to 34 | 15,414 | 5.9 | 4.2 | 17,152 | 7.8 | 6.3 | -1,738 | 2007 |
| 35 to 39 | 16,908 | 6.5 | 6.2 | 17,959 | 8.1 | 8.9 | -1,052 | 2008 |
| 40 to 44 | 18,274 | 7.0 | 7.7 | 17,574 | 8.0 | 8.5 | +700 | 2009 |
| 45 to 49 | 20,303 | 7.8 | 8.8 | 15,896 | 7.2 | 8.0 | +4,406 | 2010 |
| 50 to 54 | 19,262 | 7.4 | 8.2 | 13,865 | 6.3 | 5.2 | +5,397 | 2011 |
| 55 to 59 | 17,314 | 6.6 | 6.4 | 13,246 | 6.0 | 5.8 | +4,068 | 2012 |
| 60 to 64 | 14,689 | 5.6 | 5.4 | 11,196 | 5.1 | 4.0 | +3,492 | 2013 |
| 65 to 69 | 12,264 | 4.7 | 4.2 | 8,687 | 3.9 | 3.0 | +3,577 | 2014 |
| 70 to 74 | 11,422 | 4.4 | 3.3 | 6,618 | 3.0 | 2.4 | +4,803 | 2015 |
| 75 to 79 | 9,568 | 3.7 | 2.7 | 6,639 | 3.0 | 2.5 | +2,929 | 2016 |
| 80 to 84 | 6,717 | 2.6 | 1.6 | 5,668 | 2.6 | 2.7 | +1,049 | 2017 |
| 85 and over | 7,227 | 2.8 | 1.6 | 5,306 | 2.4 | 2.3 | +1,921 | 2018 |
| Total population | 260,624 | 100.0 | 100.0 | 220,578 | 100.0 | 100.0 | +40,046 | |
Source: Australian Bureau of Statistics, Census of Population and Housing (opens a new window) 2006 and 2021. Compiled and presented by .id (opens a new window)(informed decisions).
(Enumerated data)
Compiled and presented in profile.id by .id (informed decisions).
Compiled and presented in profile.id by .id (informed decisions).
Dominant groups
Analysis of the five year age groups of the Northern Beaches Council area in 2021 compared to Collaroy Plateau shows that there was a lower proportion of people in the younger age groups (under 15) and a higher proportion of people in the older age groups (65+).
Overall, 18.5% of the population was aged between 0 and 15, and 18.1% were aged 65 years and over, compared with 22.2% and 13.4% respectively for Collaroy Plateau.
The major differences between the age structure of the Northern Beaches Council area and Collaroy Plateau were:
- A larger percentage of persons aged 25 to 29 (5.1% compared to 3.3%)
- A larger percentage of persons aged 30 to 34 (5.9% compared to 4.2%)
- A smaller percentage of persons aged 5 to 9 (6.2% compared to 8.3%)
- A smaller percentage of persons aged 15 to 19 (6.2% compared to 8.1%)
Emerging groups
From 2006 to 2021, Northern Beaches Council area's population increased by 40,046 people (18.2%). This represents an average annual population change of 1.12% per year over the period.
The largest changes in age structure in this area between 2006 and 2021 were in the age groups:
- 50 to 54 (+5,397 persons)
- 70 to 74 (+4,803 persons)
- 10 to 14 (+4,680 persons)
- 45 to 49 (+4,406 persons)