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Northern Beaches CouncilCommunity profile

Northern Beaches Council

SEIFA by profile area

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In 2021, Balgowlah Heights - Clontarf had the lowest level of Disadvantage in the Northern Beaches Council, with a SEIFA index score of 1,136.9.

The Northern Beaches Council Socio-Economic Indexes for Areas (SEIFA) measure the relative level of socio-economic disadvantage and/or advantage based on a range of Census characteristics. Two of the SEIFA indexes: the Index of Relative Socio-Economic Disadvantage (IRSD) and the Index of Relative Socio-Economic Advantage and Disadvantage (IRSAD) can be selected below.

Index of Relative Socio-Economic Disadvantage (IRSD)

This index contains only disadvantage indicators (e.g. unemployment, low incomes or education levels, single parent families, low skilled occupations, poor English proficiency), so is best used to distinguish between disadvantaged areas, but doesn’t differentiate between those areas which are highly advantaged, and those just lacking a lot of disadvantage (with population close to the middle). This index is most commonly used for funding allocations and advocacy, because it highlights the areas of most need.

Index of Relative Socio-Economic Advantage and Disadvantage (IRSAD)

This index contains indicators of disadvantage as well as additional indicators of advantage (e.g. professional occupations, high income, higher education levels, high rent, large dwellings), Characteristics are also weighted differently than the IRSD, so areas do score differently on either measure. Often the IRSAD index will show a more "spread out" distribution with a greater range of scores from very high to very low, due to its ability to measure advantage above the average level.

SEIFA indexes are a good place to start to get a general view of the relative level of disadvantage in one area compared to others, but it is important to also look at these underlying characteristics as they can differ markedly between areas with similar SEIFA scores and shed light on the type of disadvantage being experienced.

A higher score on the index means a lower level of disadvantage, or (in the case of IRSAD only) a higher level of advantage. A lower score on the index means a higher level of disadvantage on both indexes, and a lack of advantage on the IRSAD.

The percentile column indicates the approximate position of this small area in a ranked list of Australia’s suburbs and localities in 2021. It's meant to give a broad indication of where the area sits within the whole nation. A higher number indicates a higher socio-economic status. For instance, a percentile of 72 indicates that approximately 72% of Australia’s suburbs have a SEIFA index lower than this area (more disadvantaged), while 28% are higher. This applies a comparison to suburbs even when the index concerned doesn’t relate to a suburb.

Index of Relative Socio-economic Disadvantage
Northern Beaches Council's small areas and benchmark areas
Area2021 indexPercentile
Balgowlah Heights - Clontarf1,136.9100
North Balgowlah1,129.6100
Davidson1,125.9100
Seaforth1,120.5100
Queenscliff1,117.299
Palm Beach - Whale Beach1,116.099
Fairlight1,113.899
Bilgola1,113.399
Collaroy Plateau1,112.999
Killarney Heights1,111.999
Wheeler Heights1,111.399
Manly Council area1,109.198
Curl Curl - North Curl Curl1,107.998
Elanora Heights1,107.498
Manly Ward1,105.898
Terrey Hills - Duffys Forest1,105.798
Terrey Hills PCA1,105.798
Freshwater1,105.798
Church Point - Scotland Island - Ku-ring-gai Chase1,105.198
Manly PCA1,104.998
Manly (Pittwater Road)1,103.697
Manly (Eastern Hill)1,103.597
Frenchs Forest1,103.597
Frenchs Forest PCA1,101.297
Avalon Beach - Clareville1,099.897
Newport1,099.797
Allambie Heights1,099.596
Frenchs Forest Ward1,099.096
Belrose - Oxford Falls1,098.196
Pittwater Ward1,096.996
Pittwater Council area1,094.595
Mona Vale PCA1,094.595
Balgowlah1,093.395
North Manly1,092.595
Warriewood1,090.394
Manly (Town Centre)1,089.194
Northern Beaches Council area1,088.693
Forestville1,086.993
Beacon Hill1,086.593
Ingleside1,086.493
North District1,085.392
Bayview1,085.192
Collaroy1,085.192
Narrabeen Ward1,083.492
Cromer1,083.092
Mona Vale1,082.191
Warringah Council area1,080.790
North Narrabeen1,078.990
Manly Vale1,069.585
Brookvale-Dee Why PCA1,068.885
Curl Curl Ward1,061.380
Brookvale1,041.467
Narrabeen1,036.764
Dee Why1,034.162
Narraweena1,011.349
Greater Sydney1,010.048
Australia1,001.242
New South Wales1,000.042
Source: Australian Bureau of Statistics, Census of Population and Housing 2021. Compiled and presented in profile.id by .id (informed decisions).
Please refer to specific data notes for more information

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