Suburbs Thornleigh

New South Wales · Suburb Profile

Thornleigh NSW — Suburb Profile

Population, median income, rent prices, housing costs and demographics for Thornleigh, New South Wales. ABS Census 2021.

The population of Thornleigh NSW is 8,898 according to the 2021 Census. The median personal income in Thornleigh is $1,025 per week ($53,300 per year). Median rent in Thornleigh is $530 per week ($2,297 per month). Thornleigh has a median age of 40 years, older than the national median of 38. Thornleigh has a population density of 2299.2 people per km².

The most common overseas birthplace in Thornleigh is China. The most common religion is No Religion (43% of residents). After English, the most spoken language is Mandarin. The median monthly mortgage repayment in Thornleigh is $2,800.

There were 77 recorded offences in Thornleigh in 2025-26, a rate of 9 offences per 1,000 people. The most common offence category was theft (35 offences).

Thornleigh Map

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📍 Thornleigh, New South Wales — 33.7222°S, 151.0811°E

Crime: Low Med High 🏫 Schools (24)

Thornleigh Population

0
residents (Census 2021)

Thornleigh Median Income & Rent

💰
Median Income
$1,025/wk
$53,300 per year
#1066 of 14,663
🏠
Median Rent
$530/wk
$2,297 per month
#461 of 14,663
👤
Median Age
40years
2 years older than national median
🏡
Mortgage
$2,800/mo
Avg household size: 2.9 · 0.9 per bedroom

Thornleigh Demographics

Gender Split

Male 50.0% (4,450) Female 50.0% (4,453)

Population Density

2299.2
people per km²
8,898 people · 3.9 km²

Households

2.9
Avg household size
0.9
Persons per bedroom
$3,016
Family income/wk

Thornleigh 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 & Locality (SAL)

Thornleigh Housing Tenure

🏠
Owned outright
42.2% 937 dwellings
🏦
Owned with mortgage
57.8% 1,281 dwellings

Source: ABS Census 2021 — Suburb & Locality (SAL)

Thornleigh Country of Birth

Australia
78.9%
China
7.0%
England
4.7%
India
4.6%
Iran
1.7%
Hong Kong
1.6%
Germany
0.6%
France
0.4%
Fiji
0.3%
Canada
0.3%

Source: ABS Census 2021 G09 — Country of Birth by SAL

Thornleigh Religion

No Religion
43.0%
Catholic
24.1%
Anglican
13.8%
Hinduism
4.9%
Not stated
4.1%
Uniting Church
3.4%
Baptist
3.4%
Christian (other)
3.4%

Source: ABS Census 2021 G14 — Religion by SAL

Thornleigh Education Level

Year 12 or equivalent
83.9%
Year 10 or equivalent
11.2%
Year 11 or equivalent
3.0%
Year 9 or equivalent
1.9%

Source: ABS Census 2021 G16 — Highest Year of School by SAL

Thornleigh Languages Spoken at Home

Mandarin
31.1%
Cantonese
14.7%
Korean
12.8%
Arabic
11.5%
Other
9.3%
Hindi
7.6%
SAL Tot
6.8%
Persian ED
6.2%

Source: ABS Census 2021 G13 — Language Spoken at Home by SAL

Thornleigh Employment

💼
Employed full-time
42.8% 2,779 people
⏰
Employed part-time
20.8% 1,347 people
🔍
Unemployed
3.1% 199 people
🏠
Not in labour force
33.3% 2,164 people

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

Thornleigh Qualifications

Bachelor Degree
42.4%
Postgraduate Degree
21.4%
Advanced Diploma/Diploma
15.7%
Certificate III/IV
13.7%
Graduate Diploma/Certificate
5.2%
Certificate I/II
1.6%

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

Thornleigh Occupation

Professionals
43.7%
Managers
19.3%
Clerical & Administrative
12.4%
Technicians & Trade Workers
9.0%
Community & Personal Service
7.3%
Sales Workers
4.3%
Labourers
2.5%
Machinery Operators & Drivers
1.5%

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

Thornleigh Field of Study

Management & Commerce
26.6%
Engineering
13.9%
Society & Culture
12.9%
Health
11.8%
Information Technology
8.4%
Education
8.2%
Creative Arts
5.6%
Natural & Physical Sciences
4.4%
Architecture & Building
4.4%
Food, Hospitality & Personal Services
2.6%
Agriculture & Environment
1.2%

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

Thornleigh Dwelling Types

Separate house
83.1%
Semi-detached (2+ storey)
14.6%
Semi-detached (1 storey)
2.2%

Source: ABS Census 2021 G36 — Dwelling Structure by SAL

Thornleigh Weekly Household Income

Nil/Negative/wk
1.4%
$1-$149/wk
0.5%
$150-$299/wk
0.9%
$300-$399/wk
1.6%
$400-$499/wk
3.3%
$500-$649/wk
3.1%
$650-$799/wk
4.0%
$800-$999/wk
3.4%
$1,000-$1,249/wk
3.9%
$1,250-$1,499/wk
5.5%
$1,500-$1,749/wk
4.5%
$1,750-$1,999/wk
4.4%
$2,000-$2,499/wk
10.6%
$2,500-$2,999/wk
7.7%
$3,000-$3,499/wk
8.3%
$3,500-$3,999/wk
7.2%
$4,000+/wk
29.5%

Source: ABS Census 2021 G33 — Household Income by SAL

Thornleigh Marital Status

💍
Married
57.2% 4,029
↔️
Separated
2.4% 166
📋
Divorced
7.1% 503
🕊️
Widowed
4.0% 284
👤
Never married
29.2% 2,057

Source: ABS Census 2021 G05 — Marital Status by SAL

Thornleigh Ancestry

English
23.8%
Australian
22.6%
Other
12.1%
Chinese
11.8%
Irish
7.0%
Scottish
6.4%
Indian
4.1%
Lebanese
2.9%
Korean
2.5%
German
2.4%
Italian
2.2%
Filipino
2.2%

Source: ABS Census 2021 G08 — Ancestry by SAL

Thornleigh School & University Attendance

Primary — Government
34.7%
Secondary — Government
21.0%
Pre-school
11.3%
Vocational Education
8.9%
Secondary — Other Non-Govt
7.8%
Secondary — Catholic
7.0%
Primary — Catholic
5.4%
Primary — Other Non-Govt
4.0%

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

Thornleigh Need for Assistance

♿
Needs assistance
4.6% 799
✅
No need for assistance
95.4% 16,563

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

Thornleigh Volunteering

🤝
Volunteer
19.8% 1,358
—
Not a volunteer
80.2% 5,505

Source: ABS Census 2021 G23 — Voluntary Work by SAL

Thornleigh Monthly Mortgage Repayments

$0-$299/mo
6.8%
$300-$449/mo
1.8%
$450-$599/mo
1.2%
$600-$799/mo
2.3%
$800-$999/mo
3.3%
$1,000-$1,399/mo
5.5%
$1,400-$1,799/mo
9.6%
$1,800-$2,399/mo
18.8%
$2,400-$2,999/mo
21.0%
$3,000-$3,999/mo
29.7%

Source: ABS Census 2021 G38 — Mortgage Repayment by SAL

Thornleigh How People Get to Work

Car (driver)
61.0%
Did not go to work
23.4%
Train
6.3%
Car (passenger)
3.6%
Walked only
3.1%
Other
0.8%
Motorbike/Scooter
0.6%
Truck
0.6%
Bus
0.5%
Bicycle
0.2%

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

Thornleigh Car Ownership

0 vehicles
5.4%
1 vehicle
37.2%
2 vehicles
41.3%
3 vehicles
10.9%
4+ vehicles
5.1%

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

Thornleigh Number of Bedrooms

1 bedroom
4.4%
2 bedrooms
12.1%
3 bedrooms
39.0%
4 bedrooms
33.1%
5 bedrooms
9.2%
6+ bedrooms
2.1%

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

Thornleigh Population Mobility

14.3%
moved in the last year
36.2%
moved in the last 5 years
4.2%
unemployment rate (Census)
67.0%
labour force participation

Source: ABS Census 2021 G43 — Summary by SAL

Thornleigh Indigenous Population

0.6%
Aboriginal & Torres Strait Islander
105
Indigenous residents
17,364
Non-Indigenous residents

Source: ABS Census 2021 G07 — Indigenous Status by SAL

Thornleigh Long-term Health Conditions

Mental health
699
Asthma
360
Diabetes
212
Arthritis
204
Heart disease
180
Cancer
113
Lung condition
95
Kidney disease
62
Stroke
50
Dementia
25

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

Thornleigh Personal Weekly Income Distribution

$0 or less/wk
12.3%
$1-$149/wk
4.5%
$150-$299/wk
5.5%
$300-$399/wk
2.4%
$400-$499/wk
2.0%
$500-$649/wk
2.8%
$650-$799/wk
6.4%
$800-$999/wk
7.4%
$1,000-$1,249/wk
8.8%
$1,250-$1,499/wk
7.3%
$1,500-$1,749/wk
7.5%
$1,750-$1,999/wk
6.5%
$2,000-$2,999/wk
14.6%
$3,000-$3,499/wk
4.0%
$3,500+/wk
7.7%

Source: ABS Census 2021 G17 — Personal Income by SAL

Thornleigh Family Structure

Couple — children under 15
48.7%
Couple — no children under 15
21.1%
Couple — no children
18.9%
One parent — no children under 15
6.1%
One parent — children under 15
5.1%

Source: ABS Census 2021 G29 — Family Composition by SAL

Thornleigh Military Service

🎖️
Current ADF — Regular
0.2% 11
🛡️
Current ADF — Reserves
0.1% 6
🏅
Previously served
1.6% 109
👤
Never served
98.2% 6,760

Source: ABS Census 2021 G22 — ADF Service by SAL

Thornleigh Unpaid Carers

🤲
Provided unpaid assistance
12.8% 875
—
Did not provide
87.2% 5,985

Source: ABS Census 2021 G25 — Unpaid Assistance by SAL

Thornleigh Children Ever Born

No children
30.7%
1 child
15.9%
2 children
33.6%
3 children
15.0%
4 children
4.0%
5+ children
0.9%

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

Thornleigh When Migrants Arrived

Before 1951
29
1951–1960
78
1961–1970
173
1971–1980
214
1981–1990
405
1991–2000
607
2001–2010
867
2011–2015
450
2016
93
2017
91
2018
70
2019
85
2020
27
2021
18

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

Thornleigh Unpaid Domestic Work

Less than 5 hours
21.0%
5–14 hours
33.1%
15–29 hours
15.8%
30+ hours
10.4%
Did not do domestic work
19.6%

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

Thornleigh Household Size

1 person
16.2%
2 persons
28.2%
3 persons
19.8%
4 persons
23.9%
5 persons
8.8%
6+ persons
3.1%

Source: ABS Census 2021 G35 — Household Size by SAL

Thornleigh Where Residents Moved From

Same address
7,401
Moved from NSW
844
Moved — same area (SA2)
257
Moved from overseas
87
Moved from VIC
22
Moved from SA
11
Moved from QLD
8
Moved from NT
3

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

Thornleigh Family Blending

Intact family — no other children
92.5%
Step family — no other children
5.0%
Blended family — no other children
1.6%
Intact family — other children present
0.9%

Source: ABS Census 2021 G31 — Family Blending by SAL

Thornleigh Crime Statistics

Reported offences in 2025-26 — 77 total

Theft
35
Traffic
12
Other Against Property
9
Sexual Offences
5
Weapons
5
Assault
4
Other Against Person
4
Drug Offences
2
Property Damage
1

Offence trend by year:

2020
2021
2022
2023
2024
2025

Source: NSW BOCSAR — bocsar.nsw.gov.au

Thornleigh Schools

24
schools nearby
11
government
1133
avg ICSEA score
14,996
total students
Hornsby Girls High School Government
Secondary · 7-12 · 722 students
1209
ICSEA
Normanhurst Boys High School Government
Secondary · 7-12 · 752 students
1207
ICSEA
Beecroft Public School Government
Primary · K-6 · 837 students
1187
ICSEA
Arden Anglican School, Junior Campus Independent
Primary · K-12 · 997 students
1173
ICSEA
Barker College Independent
Secondary · K-12 · 2,856 students
1166
ICSEA
Loreto Normanhurst Independent
Combined · 5-12 · 1,240 students
1164
ICSEA
Wahroonga Adventist School Independent
Combined · K-12 · 633 students
1161
ICSEA
Our Lady of the Rosary Catholic Primary School Catholic
Primary · K-6 · 337 students
1153
ICSEA
St Agatha's Catholic Primary School Catholic
Primary · K-6 · 217 students
1147
ICSEA
Mount St Benedict College Independent
Secondary · 7-12 · 1,331 students
1147
ICSEA
Pennant Hills Public School Government
Primary · K-6 · 490 students
1143
ICSEA
Thornleigh West Public School Government
Primary · K-6 · 477 students
1142
ICSEA
Normanhurst Public School Government
Primary · K-6 · 372 students
1139
ICSEA
Normanhurst West Public School Government
Primary · K-6 · 363 students
1136
ICSEA
St Leo's Catholic College Catholic
Secondary · 7-12 · 1,055 students
1113
ICSEA

Showing 15 of 24 schools

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

View all schools in Thornleigh with map →

Thornleigh Rent Prices & Affordability

20%
of income
Affordable
Household Income $2,681/wk
Median Rent $530/wk
Rent-to-Income 19.8%

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

If you earn X in Thornleigh

≈ $11,618/month
Median rent $530/wk
Left after rent $2,151/wk
Rent share 19.8%

Cheaper alternatives with similar incomes

East Albury
Income: $858/wk Rent: $280/wk Save: $250/wk
East Tamworth
Income: $915/wk Rent: $325/wk Save: $205/wk
Bulli
Income: $952/wk Rent: $370/wk Save: $160/wk
Lochinvar
Income: $889/wk Rent: $370/wk Save: $160/wk
Lambton
Income: $846/wk Rent: $380/wk Save: $150/wk
Tatton
Income: $1,009/wk Rent: $385/wk Save: $145/wk
Tingira Heights
Income: $826/wk Rent: $400/wk Save: $130/wk
Floraville
Income: $885/wk Rent: $405/wk Save: $125/wk

Thornleigh vs State & National Average

Nearby Suburbs in NSW

Cordeaux Heights
Pop: 4,460 Income: $896/wk Rent: $495/wk
Westleigh
Pop: 4,501 Income: $1,022/wk Rent: $705/wk
Killarney Heights
Pop: 4,502 Income: $1,063/wk Rent: $923/wk
Leura
Pop: 4,503 Income: $753/wk Rent: $430/wk
Bargo
Pop: 4,516 Income: $742/wk Rent: $410/wk
Wyong
Pop: 4,530 Income: $608/wk Rent: $350/wk

Compare Thornleigh

Thornleigh vs Cordeaux Heights →Thornleigh vs Westleigh →Thornleigh vs Killarney Heights →Thornleigh vs Leura →

Frequently Asked Questions About Thornleigh

What is the population of Thornleigh NSW?

The population of Thornleigh NSW is 8,898 according to the ABS Census 2021.The suburb has a population density of 2299.2 people per km².Thornleigh is ranked #776 out of 14,663 suburbs by population.

What is the median income in Thornleigh?

The median personal income in Thornleigh NSW is $1,025 per week, or $53,300 per year.The median household income is $2,681 per week.Family income is $3,016 per week.Thornleigh is ranked #1,066 by income out of 14,663 Australian suburbs.

How much is rent in Thornleigh?

Median rent in Thornleigh NSW is $530 per week ($2,297 per month).Rent represents 19.8% of household income, which is considered affordable.Thornleigh ranks #461 out of 14,663 suburbs by rent.

What are mortgage repayments in Thornleigh?

The median monthly mortgage repayment in Thornleigh NSW is $2,800. This data comes from the ABS Census 2021 and reflects mortgage repayments for owner-occupied dwellings.

What is the median age in Thornleigh?

The median age in Thornleigh NSW is 40 years.This is older than the national median age of 38 years.

Is Thornleigh a good suburb to live in?

Thornleigh is a suburb in New South Wales with a population of 8,898.The median income is $1,025/wk, which is above the NSW average of $781/wk.Rent affordability is rated as affordable (19.8% of household income). See the full suburb profile above for detailed statistics.

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Data: Australian Bureau of Statistics, Census of Population and Housing 2021. SA2 area: 13866. All dollar figures in AUD.