Seaforth, NSW: suburb profile

The population of Seaforth NSW is 7,384 according to the 2021 Census. The median personal income in Seaforth is $1,263 per week ($65,676 per year). Median rent in Seaforth is $875 per week ($3,792 per month). Seaforth has a median age of 42 years, older than the national median of 38. Seaforth has a population density of 2,376 people per km².

The most common overseas birthplace in Seaforth is England. The most common religion is No religion (41.7% of residents). After English, the most spoken language is Mandarin. The median monthly mortgage repayment in Seaforth is $4,333.

There were 37 recorded offences in Seaforth in 2025-26, a rate of 5 offences per 1,000 people. The most common offence category was theft (16 offences).

Population
7,384
Census 2021
Median income
$1,263/wk
Personal, Census 2021
Median rent
$875/wk
Weekly, Census 2021
Median age
42years
Census 2021

Valid: Census 2021 · Source: ABS Census of Population and Housing 2021; offences from NSW BOCSAR (bocsar.nsw.gov.au), 2025-26.

Seaforth vs the typical NSW suburb

The median personal income in Seaforth is $1,263 a week, 65% above the typical NSW suburb ($765). That ranks 111th of 2,150 NSW suburbs with 200 or more residents. Median rent is $875 a week, $490 more than the typical NSW suburb. Rent takes 20.9% of the median household income here, against 22.6% in the typical NSW suburb. The median resident is 42, 1 year younger than in the typical NSW suburb (43).

The typical suburb is the median across suburbs with 200 or more residents. ABS Census 2021, calculated by GDP.com.au.
MeasureSeaforthTypical NSWDifferenceTypical Australia
Personal income$1,263/wk$765/wk +65%$766/wk
Household income$4,184/wk$1,704/wk +146%$1,637/wk
Rent$875/wk$385/wk +127%$330/wk
Mortgage repayment$4,333/mo$1,965/mo +121%$1,733/mo
Median age4243 −1 yrs42
Rent share of household income20.9%22.6% −1.7 pts20.3%
Income, rent and mortgage against the typical suburb Valid: Census 2021 · Source: ABS, calculated by GDP.com.au
Bar chart of median income, rent and mortgage repayment in Seaforth, the typical NSW suburb and the typical Australian suburb.

Seaforth Population

7,384 residents at the 2021 Census.

Seaforth Median Income & Rent

Median Income
$1,263/wk
$65,676 per year
Ranked 321 of 14,663
Median Rent
$875/wk
$3,792 per month
Ranked 37 of 14,663
Median Age
42years
4 years older than the national median
Mortgage
$4,333/mo
Avg household size: 3.1 · 0.8 per bedroom

Valid: Census 2021 · Source: ABS Census of Population and Housing.

Seaforth Rent Prices & Affordability

21% of median household income goes on median rent

Marks at 25% and 35%. Band: affordable.

Household income $4,184/wk
Median rent $875/wk
Rent to income 20.9%

Rent is under 25% of household income, generally considered affordable.

Median rent in Seaforth against your income

About $18,131 a month
Median rent $875/wk
Left after rent $3,309/wk
Rent share 20.9%

Seaforth Schools

20
schools nearby
14
government
1138
avg ICSEA score
8,418
total students
Northbridge Public School Government
Primary · K-6 · 364 students
1181
ICSEA
Balgowlah Heights Public School Government
Primary · K-6 · 651 students
1177
ICSEA
St Philip Neri Catholic Primary School Catholic
Primary · K-6 · 102 students
1170
ICSEA
Balgowlah North Public School Government
Primary · K-6 · 381 students
1169
ICSEA
St Cecilia's Catholic Primary School Catholic
Primary · K-6 · 232 students
1168
ICSEA
Farmhouse Montessori School Independent
Primary · K-6 · 37 students
1165
ICSEA
Seaforth Public School Government
Primary · K-6 · 394 students
1165
ICSEA
Beauty Point Public School Government
Primary · K-6 · 205 students
1154
ICSEA
Killarney Heights Public School Government
Primary · K-6 · 661 students
1150
ICSEA
Manly West Public School Government
Primary · K-6 · 761 students
1147
ICSEA
Allambie Heights Public School Government
Primary · K-6 · 406 students
1138
ICSEA
Killarney Heights High School Government
Secondary · 7-12 · 969 students
1132
ICSEA
Manly Vale Public School Government
Primary · K-6 · 553 students
1129
ICSEA
St Kieran's Catholic Primary School Catholic
Primary · K-6 · 141 students
1122
ICSEA
Northern Beaches Secondary College Balgowlah Boys Campus Government
Secondary · 7-12 · 1,100 students
1115
ICSEA

Showing 15 of 20 schools.

Source: Australian Curriculum, Assessment and Reporting Authority (ACARA), 2025. ICSEA is the Index of Community Socio-Educational Advantage (national average 1000).

All schools near Seaforth, with a map

Seaforth Map

Seaforth, New South Wales Map data: OpenStreetMap
Loading map…

Seaforth, New South Wales: 33.7911°S, 151.2431°E

Seaforth Circle size: offences per 1,000 residents Schools (20)

People in Seaforth

Demographics

Gender Split

Male 49.6% (3,660) Female 50.4% (3,719)

Population Density

2,376
people per km²
7,384 people · 3.1 km²

Households

3.1
Avg household size
0.8
Persons per bedroom
$4,620
Family income/wk

Age Distribution

0-4
5-9
10-14
15-19
20-24
25-29
30-34
35-39
40-44
45-49
50-54
55-59
60-64
65-69
70-74
75-79
80-84
85+
Male Female

Source: ABS Census 2021, Suburb and Locality (SAL)

Most common overseas birthplaces

England
9.5%
China
2.5%
New Zealand
2.2%
South Africa
1.7%
United States of America
1.5%
Ireland
1.1%
Hong Kong
0.9%

Shares are of all residents. Source: ABS Census 2021, G09 Country of Birth by SAL

Most common languages at home other than English

Mandarin
2.9%
Cantonese
1.2%
Spanish
1.2%
Greek
1.1%
German
1.0%
French
0.9%
Italian
0.9%

Shares are of all residents. Source: ABS Census 2021, G13 Language Used at Home by SAL

Ancestry

English
42.6%
Australian
29.4%
Irish
13.8%
Scottish
11.1%
Chinese
6.1%
Italian
5.4%
German
4.2%
Greek
2.3%
Dutch
1.7%
South African
1.7%
New Zealander
1.6%

Shares are of the suburb population. People can report up to two ancestries, so shares add to more than 100%. Source: ABS Census 2021, G08 Ancestry by SAL

Religion

No religion
41.7%
Catholic
24.8%
Anglican
16.3%
Not stated
5.0%
Eastern Orthodox
2.7%
Uniting Church
1.5%
Christian (other)
1.4%
Presbyterian and Reformed
1.3%

Source: ABS Census 2021, G14 Religion by SAL

Indigenous Population

0.5%
Aboriginal & Torres Strait Islander

Source: ABS Census 2021, G07 Indigenous Status by SAL

Marital Status

Married
60.5% 3,428
Separated
1.3% 72
Divorced
6.0% 340
Widowed
3.7% 207
Never married
28.6% 1,623

Source: ABS Census 2021, G05 Marital Status by SAL

Family Structure

Couple: children under 15
53.4%
Couple: no children under 15
21.5%
Couple: no children
17.3%
One parent: no children under 15
4.0%
One parent: children under 15
3.9%

Source: ABS Census 2021, G29 Family Composition by SAL

Household Size

1 person
11.5%
2 persons
27.5%
3 persons
16.7%
4 persons
29.0%
5 persons
12.0%
6+ persons
3.4%

Source: ABS Census 2021, G35 Household Size by SAL

Homes in Seaforth

Housing Tenure

Of the 2,267 occupied private dwellings in Seaforth at the 2021 Census, 16.2% were rented, 38.6% owned outright and 43.6% owned with a mortgage.

Other tenure type
0.9% 21 dwellings
Owned outright
38.6% 876 dwellings
Owned with mortgage
43.6% 988 dwellings
Rented
16.2% 367 dwellings
Tenure type not stated
0.8% 19 dwellings

Source: ABS Census 2021, Suburb and Locality (SAL)

Dwelling Types

Separate house
91.6%
Semi-detached (2+ storey)
7.6%
Semi-detached (1 storey)
0.8%

Source: ABS Census 2021, G36 Dwelling Structure by SAL

Number of Bedrooms

1 bedroom
1.5%
2 bedrooms
6.9%
3 bedrooms
32.1%
4 bedrooms
38.2%
5 bedrooms
18.6%
6+ bedrooms
2.7%

Source: ABS Census 2021, G41 Number of Bedrooms by SAL

Monthly Mortgage Repayments

$0-$299/mo
14.7%
$300-$449/mo
0.8%
$450-$599/mo
0.8%
$600-$799/mo
3.4%
$800-$999/mo
1.8%
$1,000-$1,399/mo
6.2%
$1,400-$1,799/mo
8.0%
$1,800-$2,399/mo
21.9%
$2,400-$2,999/mo
13.9%
$3,000-$3,999/mo
28.6%

Source: ABS Census 2021, G38 Mortgage Repayment by SAL

Car Ownership

0 vehicles
2.8%
1 vehicle
28.4%
2 vehicles
46.9%
3 vehicles
14.3%
4+ vehicles
7.5%

Source: ABS Census 2021, G34 Motor Vehicles per Dwelling by SAL

Work, income and education in Seaforth

Employment

Employed full-time
40.5% 2,092 people
Employed part-time
21.3% 1,099 people
Unemployed
2.2% 114 people
Not in labour force
36.0% 1,862 people

Source: ABS Census 2021, G46 Labour Force Status by SAL

Occupation

Professionals
41.3%
Managers
31.5%
Clerical & Administrative
9.8%
Technicians & Trade Workers
5.3%
Community & Personal Service
5.2%
Sales Workers
5.1%
Labourers
1.0%
Machinery Operators & Drivers
0.8%

Source: ABS Census 2021, G51 Industry of Employment by Occupation

Weekly Household Income

Nil/Negative/wk
1.6%
$1-$149/wk
0.6%
$150-$299/wk
0.9%
$300-$399/wk
0.4%
$400-$499/wk
2.0%
$500-$649/wk
2.0%
$650-$799/wk
2.7%
$800-$999/wk
2.9%
$1,000-$1,249/wk
3.7%
$1,250-$1,499/wk
3.4%
$1,500-$1,749/wk
2.8%
$1,750-$1,999/wk
3.4%
$2,000-$2,499/wk
6.6%
$2,500-$2,999/wk
6.0%
$3,000-$3,499/wk
6.0%
$3,500-$3,999/wk
3.9%
$4,000+/wk
51.1%

Source: ABS Census 2021, G33 Household Income by SAL

Personal Weekly Income Distribution

$0 or less/wk
12.5%
$1-$149/wk
4.9%
$150-$299/wk
4.3%
$300-$399/wk
1.7%
$400-$499/wk
1.4%
$500-$649/wk
2.4%
$650-$799/wk
5.4%
$800-$999/wk
6.3%
$1,000-$1,249/wk
6.5%
$1,250-$1,499/wk
5.8%
$1,500-$1,749/wk
5.6%
$1,750-$1,999/wk
5.0%
$2,000-$2,999/wk
11.4%
$3,000-$3,499/wk
4.9%
$3,500+/wk
22.0%

Source: ABS Census 2021, G17 Personal Income by SAL

How People Get to Work

Car (driver)
57.6%
Did not go to work
26.8%
Car (passenger)
5.1%
Bus
4.2%
Walked only
2.0%
Truck
1.1%
Bicycle
1.0%
Other
0.8%
Motorbike/Scooter
0.7%
Taxi/Rideshare
0.5%
Train
0.2%

Source: ABS Census 2021, G62 Method of Travel to Work by SAL

Education Level

Year 12 or equivalent
85.5%
Year 10 or equivalent
9.2%
Year 11 or equivalent
3.8%
Year 9 or equivalent
1.5%

Shares are of people whose highest year of school is Year 9 to 12 only. Source: ABS Census 2021, G16 Highest Year of School by SAL

Qualifications

Bachelor Degree
49.5%
Postgraduate Degree
17.9%
Advanced Diploma/Diploma
15.9%
Certificate III/IV
11.2%
Graduate Diploma/Certificate
4.4%
Certificate I/II
1.1%

Source: ABS Census 2021, G49 Non-School Qualification by SAL

Field of Study

Management & Commerce
37.0%
Society & Culture
17.2%
Engineering
8.8%
Health
8.5%
Creative Arts
6.2%
Education
5.6%
Architecture & Building
4.6%
Information Technology
4.6%
Natural & Physical Sciences
4.3%
Food, Hospitality & Personal Services
2.0%
Agriculture & Environment
1.1%

Source: ABS Census 2021, G51 Field of Study by SAL

School & University Attendance

Primary: Government
27.5%
Secondary: Other Non-Govt
16.9%
Secondary: Catholic
12.4%
Pre-school
11.3%
Secondary: Government
11.0%
Primary: Catholic
7.5%
Primary: Other Non-Govt
7.3%
Vocational Education
6.1%

Source: ABS Census 2021, G15 Type of Educational Institution by SAL

More from the 2021 Census

Need for Assistance

Does not have need for assistance
93.5%
Has need for assistance
3.0%
Need for assistance not stated
3.4%

Source: ABS Census 2021, G18 Core Activity Need for Assistance by SAL

Long-term Health Conditions

Mental health
419
Asthma
218
Heart disease
158
Arthritis
136
Cancer
107
Diabetes
100
Lung condition
52
Kidney disease
51
Stroke
44
Dementia
19

Source: ABS Census 2021, G19 Long-term Health Conditions by SAL

Unpaid Carers

Provided unpaid assistance
11.3% 616
Did not provide
88.7% 4,825

Source: ABS Census 2021, G25 Unpaid Assistance by SAL

Volunteering

Volunteer
21.0% 1,149
Not a volunteer
79.0% 4,316

Source: ABS Census 2021, G23 Voluntary Work by SAL

Military Service

Current ADF: Regular
0.3% 17
Current ADF: Reserves
0.1% 8
Previously served
1.5% 82
Never served
98.0% 5,377

Source: ABS Census 2021, G22 ADF Service by SAL

Children Ever Born

No children
28.7%
1 child
11.1%
2 children
38.7%
3 children
16.4%
4 children
4.6%
5+ children
0.4%

Source: ABS Census 2021, G28 Children Ever Born by SAL

When Migrants Arrived

Before 1951
26
1951: 1960
68
1961: 1970
178
1971: 1980
187
1981: 1990
299
1991: 2000
372
2001: 2010
640
2011: 2015
344
2016
37
2017
46
2018
58
2019
61
2020
33
2021
11

Source: ABS Census 2021, G10 Year of Arrival by SAL

Population Mobility

12.9%
moved in the last year
36.3%
moved in the last 5 years
3.3%
unemployment rate (Census)
63.5%
labour force participation

Source: ABS Census 2021, G43 Summary by SAL

Where Residents Moved From

Same address
6,162
Moved from NSW
587
Moved: same area (SA2)
185
Moved from overseas
75
Moved from VIC
15
Moved from ACT
10
Moved from SA
8
Moved from QLD
4
Moved from TAS
3

Source: ABS Census 2021, G44 Address 1 Year Ago by SAL

Unpaid Domestic Work

Less than 5 hours
23.1%
5: 14 hours
32.7%
15: 29 hours
16.6%
30+ hours
10.5%
Did not do domestic work
17.1%

Source: ABS Census 2021, G24 Unpaid Domestic Work by SAL

Family Blending

Intact family: no other children
90.2%
Step family: no other children
6.7%
Blended family: no other children
2.5%
Other couple: children only
0.3%
Intact family: other children present
0.2%

Source: ABS Census 2021, G31 Family Blending by SAL

Seaforth Crime Statistics

37 reported offences in 2025-26, by category.

Theft
16
Other Against Property
10
Property Damage
4
Other Against Person
3
Drug Offences
2
Assault
1
Traffic
1

Total offences by year

2020
2021
2022
2023
2024
2025

Source: NSW BOCSAR (bocsar.nsw.gov.au).

Cheaper alternatives with similar incomes

Table Top
Income: $1,052/wk Rent: $380/wk $495/wk less rent
Yellow Rock (Blue Mountains - NSW)
Income: $1,018/wk Rent: $400/wk $475/wk less rent
Newcastle West
Income: $1,022/wk Rent: $460/wk $415/wk less rent
Yarrawarrah
Income: $1,020/wk Rent: $520/wk $355/wk less rent
Austinmer
Income: $1,080/wk Rent: $550/wk $325/wk less rent
Greenwich
Income: $1,457/wk Rent: $550/wk $325/wk less rent
Little Bay
Income: $1,141/wk Rent: $590/wk $285/wk less rent
Drummoyne
Income: $1,388/wk Rent: $600/wk $275/wk less rent

Suburbs near Seaforth

The closest suburb to Seaforth is North Balgowlah, 0.9 km away.

North Balgowlah
0.9 km away · income $1,254/wk · rent $825/wk
Balgowlah
1.7 km away · income $1,264/wk · rent $640/wk
Clontarf (NSW)
2.3 km away · income $1,385/wk · rent $1,250/wk
Manly Vale
2.3 km away · income $1,158/wk · rent $550/wk
Castlecrag
2.4 km away · income $1,446/wk · rent $1,010/wk
Allambie Heights
2.4 km away · income $1,006/wk · rent $600/wk

Compare Seaforth (NSW)

Frequently Asked Questions About Seaforth

What is the population of Seaforth NSW?

The population of Seaforth NSW is 7,384 according to the ABS Census 2021. The suburb has a population density of 2,376 people per km². Seaforth is ranked #984 out of 14,663 suburbs by population.

What is the median income in Seaforth?

The median personal income in Seaforth NSW is $1,263 per week, or $65,676 per year. The median household income is $4,184 per week. Family income is $4,620 per week. Seaforth is ranked #321 by income out of 14,663 Australian suburbs.

How much is rent in Seaforth?

Median rent in Seaforth NSW is $875 per week ($3,792 per month). Rent represents 20.9% of household income, which is considered affordable. Seaforth ranks #37 out of 14,663 suburbs by rent.

What are mortgage repayments in Seaforth?

The median monthly mortgage repayment in Seaforth NSW is $4,333. This data comes from the ABS Census 2021 and reflects mortgage repayments for owner-occupied dwellings.

What is the median age in Seaforth?

The median age in Seaforth NSW is 42 years. This is older than the national median age of 38 years.

Is Seaforth a good suburb to live in?

Seaforth is a suburb in New South Wales with a population of 7,384. The median income is $1,263/wk, which is above the typical NSW suburb ($765/wk). Rent affordability is rated as affordable (20.9% of household income). See the full suburb profile above for detailed statistics.

Explore More

Australian Average Salary Australian House Prices Sydney Cost of Living

Data: Australian Bureau of Statistics, Census of Population and Housing 2021. SA2 area: 13524. All dollar figures in AUD.