Duffys Forest, NSW: suburb profile

The population of Duffys Forest NSW is 509 according to the 2021 Census. The median personal income in Duffys Forest is $1,223 per week ($63,596 per year). Median rent in Duffys Forest is $625 per week ($2,708 per month). Duffys Forest has a median age of 43 years, older than the national median of 38. Duffys Forest has a population density of 110 people per km².

The most common overseas birthplace in Duffys Forest is England. The most common religion is No religion (43.4% of residents). After English, the most spoken language is Mandarin. The median monthly mortgage repayment in Duffys Forest is $6,134.

There were 1 recorded offences in Duffys Forest in 2025-26, a rate of 2 offences per 1,000 people. The most common offence category was other against person (1 offences).

Population
509
Census 2021
Median income
$1,223/wk
Personal, Census 2021
Median rent
$625/wk
Weekly, Census 2021
Median age
43years
Census 2021

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

Duffys Forest vs the typical NSW suburb

The median personal income in Duffys Forest is $1,223 a week, 60% above the typical NSW suburb ($765). That ranks 132nd of 2,150 NSW suburbs with 200 or more residents. Median rent is $625 a week, $240 more than the typical NSW suburb. Rent takes 14.7% of the median household income here, against 22.6% in the typical NSW suburb. The median resident is 43, the same age as in the typical NSW suburb.

The typical suburb is the median across suburbs with 200 or more residents. ABS Census 2021, calculated by GDP.com.au.
MeasureDuffys ForestTypical NSWDifferenceTypical Australia
Personal income$1,223/wk$765/wk +60%$766/wk
Household income$4,250/wk$1,704/wk +149%$1,637/wk
Rent$625/wk$385/wk +62%$330/wk
Mortgage repayment$6,134/mo$1,965/mo +212%$1,733/mo
Median age4343 0 yrs42
Rent share of household income14.7%22.6% −7.9 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 Duffys Forest, the typical NSW suburb and the typical Australian suburb.

Duffys Forest Population

509 residents at the 2021 Census.

Duffys Forest Median Income & Rent

Median Income
$1,223/wk
$63,596 per year
Ranked 380 of 14,663
Median Rent
$625/wk
$2,708 per month
Ranked 169 of 14,663
Median Age
43years
5 years older than the national median
Mortgage
$6,134/mo
Avg household size: 3.2 · 0.8 per bedroom

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

Duffys Forest Rent Prices & Affordability

15% of median household income goes on median rent

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

Household income $4,250/wk
Median rent $625/wk
Rent to income 14.7%

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

Median rent in Duffys Forest against your income

About $18,417 a month
Median rent $625/wk
Left after rent $3,625/wk
Rent share 14.7%

Duffys Forest Schools

5
schools nearby
0
government
1082
avg ICSEA score
1,563
total students
Sydney Japanese International School Independent
Primary · K-9 · 190 students
1137
ICSEA
Northern Beaches Christian School Independent
Combined · K-12 · 1,228 students
1134
ICSEA
Kinma School Independent
Primary · K-6 · 67 students
1096
ICSEA
A.G.B.U. Alexander Primary School Independent
Primary · K-6 · 78 students
962
ICSEA
Mosman Preparatory School Outdoor Education Centre Independent
Primary

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

All schools near Duffys Forest, with a map

Duffys Forest Map

Duffys Forest, New South Wales Map data: OpenStreetMap
Loading map…

Duffys Forest, New South Wales: 33.6747°S, 151.1894°E

Duffys Forest Circle size: offences per 1,000 residents Schools (5)

People in Duffys Forest

Demographics

Gender Split

Male 51.9% (267) Female 48.1% (247)

Population Density

110
people per km²
509 people · 4.6 km²

Households

3.2
Avg household size
0.8
Persons per bedroom
$4,374
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
8.1%
South Africa
4.7%
Italy
2.6%
New Zealand
2.6%
China
2.4%
Philippines
1.2%
Scotland
1.0%

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

Most common languages at home other than English

Mandarin
3.3%
Italian
2.8%
Arabic
1.6%
Vietnamese
1.0%
Afrikaans
0.8%
Cantonese
0.8%
Australian Indigenous Languages
0.0%

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

Ancestry

English
44.6%
Australian
29.7%
Scottish
14.3%
Irish
12.6%
Italian
8.6%
Chinese
4.5%
German
4.1%
South African
3.7%
New Zealander
2.8%
Lebanese
2.0%
Hungarian
1.8%

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
43.4%
Catholic
23.4%
Anglican
18.1%
Uniting Church
4.7%
Not stated
4.1%
Othr Protestnt
1.8%
Presbyterian and Reformed
1.6%
Buddhism
1.6%

Source: ABS Census 2021, G14 Religion by SAL

Indigenous Population

0.0%
Aboriginal & Torres Strait Islander

Source: ABS Census 2021, G07 Indigenous Status by SAL

Marital Status

Married
59.5% 247
Separated
1.7% 7
Divorced
7.0% 29
Widowed
0.7% 3
Never married
31.1% 129

Source: ABS Census 2021, G05 Marital Status by SAL

Family Structure

Couple: children under 15
44.6%
Couple: no children under 15
30.0%
Couple: no children
19.9%
One parent: no children under 15
3.1%
One parent: children under 15
2.4%

Source: ABS Census 2021, G29 Family Composition by SAL

Household Size

1 person
11.6%
2 persons
27.1%
3 persons
15.5%
4 persons
30.3%
5 persons
7.1%
6+ persons
8.4%

Source: ABS Census 2021, G35 Household Size by SAL

Homes in Duffys Forest

Housing Tenure

Of the 152 occupied private dwellings in Duffys Forest at the 2021 Census, 17.8% were rented, 46.7% owned outright and 35.5% owned with a mortgage.

Other tenure type
2.0% 3 dwellings
Owned outright
46.7% 71 dwellings
Owned with mortgage
35.5% 54 dwellings
Rented
17.8% 27 dwellings

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

Dwelling Types

Separate house
100.0%

Source: ABS Census 2021, G36 Dwelling Structure by SAL

Number of Bedrooms

1 bedroom
6.0%
2 bedrooms
4.7%
3 bedrooms
14.7%
4 bedrooms
25.3%
5 bedrooms
36.0%
6+ bedrooms
13.3%

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

Monthly Mortgage Repayments

$0-$299/mo
62.5%
$3,000-$3,999/mo
37.5%

Source: ABS Census 2021, G38 Mortgage Repayment by SAL

Car Ownership

1 vehicle
12.2%
2 vehicles
41.2%
3 vehicles
15.5%
4+ vehicles
31.1%

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

Work, income and education in Duffys Forest

Employment

Employed full-time
34.5% 131 people
Employed part-time
26.8% 102 people
Unemployed
3.4% 13 people
Not in labour force
35.3% 134 people

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

Occupation

Managers
37.8%
Professionals
28.6%
Sales Workers
9.7%
Technicians & Trade Workers
8.6%
Clerical & Administrative
8.1%
Community & Personal Service
3.8%
Machinery Operators & Drivers
1.6%
Labourers
1.6%

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

Weekly Household Income

Nil/Negative/wk
3.6%
$400-$499/wk
2.2%
$500-$649/wk
2.2%
$800-$999/wk
7.3%
$1,000-$1,249/wk
2.9%
$1,250-$1,499/wk
5.8%
$1,500-$1,749/wk
2.2%
$1,750-$1,999/wk
2.9%
$2,000-$2,499/wk
5.1%
$2,500-$2,999/wk
5.1%
$3,000-$3,499/wk
5.1%
$3,500-$3,999/wk
5.1%
$4,000+/wk
50.4%

Source: ABS Census 2021, G33 Household Income by SAL

Personal Weekly Income Distribution

$0 or less/wk
13.1%
$1-$149/wk
3.1%
$150-$299/wk
2.8%
$300-$399/wk
1.7%
$400-$499/wk
0.8%
$500-$649/wk
1.7%
$650-$799/wk
7.0%
$800-$999/wk
5.0%
$1,000-$1,249/wk
10.3%
$1,250-$1,499/wk
8.9%
$1,500-$1,749/wk
6.1%
$1,750-$1,999/wk
4.2%
$2,000-$2,999/wk
8.6%
$3,000-$3,499/wk
6.1%
$3,500+/wk
20.6%

Source: ABS Census 2021, G17 Personal Income by SAL

How People Get to Work

Car (driver)
74.4%
Did not go to work
19.5%
Walked only
6.0%

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

Education Level

Year 12 or equivalent
78.7%
Year 10 or equivalent
14.2%
Year 11 or equivalent
4.4%
Year 9 or equivalent
2.7%

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
45.5%
Certificate III/IV
18.6%
Advanced Diploma/Diploma
18.2%
Postgraduate Degree
9.5%
Graduate Diploma/Certificate
5.8%
Certificate I/II
2.5%

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

Field of Study

Management & Commerce
37.5%
Society & Culture
13.0%
Engineering
12.5%
Health
10.3%
Education
7.6%
Architecture & Building
6.0%
Agriculture & Environment
4.3%
Natural & Physical Sciences
3.3%
Creative Arts
2.2%
Information Technology
1.6%
Food, Hospitality & Personal Services
1.6%

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

School & University Attendance

Secondary: Other Non-Govt
34.5%
Primary: Other Non-Govt
18.1%
Primary: Government
17.2%
Secondary: Government
9.5%
Secondary: Catholic
7.8%
Vocational Education
6.9%
Pre-school
6.0%

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
94.3%
Has need for assistance
1.6%
Need for assistance not stated
3.5%

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

Long-term Health Conditions

Mental health
25
Asthma
18
Arthritis
15
Heart disease
9
Diabetes
8
Cancer
6
Lung condition
3

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

Unpaid Carers

Provided unpaid assistance
13.1% 52
Did not provide
86.9% 346

Source: ABS Census 2021, G25 Unpaid Assistance by SAL

Volunteering

Volunteer
22.3% 89
Not a volunteer
77.7% 310

Source: ABS Census 2021, G23 Voluntary Work by SAL

Military Service

Previously served
2.5% 10
Never served
97.5% 389

Source: ABS Census 2021, G22 ADF Service by SAL

Children Ever Born

No children
36.2%
1 child
2.3%
2 children
37.4%
3 children
17.2%
4 children
6.9%

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

When Migrants Arrived

Before 1951
3
1951: 1960
7
1961: 1970
16
1971: 1980
19
1981: 1990
16
1991: 2000
34
2001: 2010
21
2011: 2015
9
2017
8

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

Population Mobility

11.0%
moved in the last year
35.5%
moved in the last 5 years
3.4%
unemployment rate (Census)
64.2%
labour force participation

Source: ABS Census 2021, G43 Summary by SAL

Where Residents Moved From

Same address
439
Moved from NSW
40
Moved: same area (SA2)
3

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

Unpaid Domestic Work

Less than 5 hours
19.6%
5: 14 hours
32.7%
15: 29 hours
15.3%
30+ hours
12.4%
Did not do domestic work
20.0%

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

Family Blending

Intact family: no other children
84.9%
Step family: no other children
10.5%
Blended family: no other children
4.7%

Source: ABS Census 2021, G31 Family Blending by SAL

Duffys Forest Crime Statistics

1 reported offences in 2025-26, by category.

Other Against Person
1

Total offences by year

2020
2021
2022
2023
2024
2025

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

Cheaper alternatives with similar incomes

Kurrajong Heights
Income: $1,055/wk Rent: $450/wk $175/wk less rent
Gundaroo
Income: $1,352/wk Rent: $475/wk $150/wk less rent
Oatley
Income: $1,064/wk Rent: $490/wk $135/wk less rent
Cronulla
Income: $1,179/wk Rent: $500/wk $125/wk less rent
Russell Lea
Income: $1,133/wk Rent: $520/wk $105/wk less rent
Beecroft
Income: $1,076/wk Rent: $590/wk $35/wk less rent
Turramurra
Income: $1,144/wk Rent: $590/wk $35/wk less rent
Allambie Heights
Income: $1,006/wk Rent: $600/wk $25/wk less rent

Suburbs near Duffys Forest

The closest suburb to Duffys Forest is Terrey Hills, 3.0 km away.

Terrey Hills
3.0 km away · income $973/wk · rent $600/wk
North Turramurra
3.7 km away · income $886/wk · rent $760/wk
St Ives Chase
3.9 km away · income $1,025/wk · rent $950/wk
Mount Colah
5.4 km away · income $1,032/wk · rent $525/wk
Belrose
5.6 km away · income $903/wk · rent $890/wk
Mount Kuring-Gai
5.8 km away · income $961/wk · rent $568/wk

Compare Duffys Forest

Frequently Asked Questions About Duffys Forest

What is the population of Duffys Forest NSW?

The population of Duffys Forest NSW is 509 according to the ABS Census 2021. The suburb has a population density of 110 people per km². Duffys Forest is ranked #5,000 out of 14,663 suburbs by population.

What is the median income in Duffys Forest?

The median personal income in Duffys Forest NSW is $1,223 per week, or $63,596 per year. The median household income is $4,250 per week. Family income is $4,374 per week. Duffys Forest is ranked #380 by income out of 14,663 Australian suburbs.

How much is rent in Duffys Forest?

Median rent in Duffys Forest NSW is $625 per week ($2,708 per month). Rent represents 14.7% of household income, which is considered affordable. Duffys Forest ranks #169 out of 14,663 suburbs by rent.

What are mortgage repayments in Duffys Forest?

The median monthly mortgage repayment in Duffys Forest NSW is $6,134. This data comes from the ABS Census 2021 and reflects mortgage repayments for owner-occupied dwellings.

What is the median age in Duffys Forest?

The median age in Duffys Forest NSW is 43 years. This is older than the national median age of 38 years.

Is Duffys Forest a good suburb to live in?

Duffys Forest is a suburb in New South Wales with a population of 509. The median income is $1,223/wk, which is above the typical NSW suburb ($765/wk). Rent affordability is rated as affordable (14.7% of household income). See the full suburb profile above for detailed statistics.

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Australian Average Salary Australian House Prices Sydney Cost of Living

Data: Australian Bureau of Statistics, Census of Population and Housing 2021. SA2 area: 11304. All dollar figures in AUD.