Mount Colah, NSW: suburb profile

The population of Mount Colah NSW is 7,816 according to the 2021 Census. The median personal income in Mount Colah is $1,032 per week ($53,664 per year). Median rent in Mount Colah is $525 per week ($2,275 per month). Mount Colah has a median age of 40 years, older than the national median of 38. Mount Colah has a population density of 707 people per km².

The most common overseas birthplace in Mount Colah is England. The most common religion is No religion (40.1% of residents). After English, the most spoken language is Mandarin. The median monthly mortgage repayment in Mount Colah is $2,544.

There were 27 recorded offences in Mount Colah in 2025-26, a rate of 3 offences per 1,000 people. The most common offence category was theft (11 offences).

Population
7,816
Census 2021
Median income
$1,032/wk
Personal, Census 2021
Median rent
$525/wk
Weekly, Census 2021
Median age
40years
Census 2021

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

Mount Colah vs the typical NSW suburb

The median personal income in Mount Colah is $1,032 a week, 35% above the typical NSW suburb ($765). That ranks 309th of 2,150 NSW suburbs with 200 or more residents. Median rent is $525 a week, $140 more than the typical NSW suburb. Rent takes 21.0% of the median household income here, against 22.6% in the typical NSW suburb. The median resident is 40, 3 years 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.
MeasureMount ColahTypical NSWDifferenceTypical Australia
Personal income$1,032/wk$765/wk +35%$766/wk
Household income$2,505/wk$1,704/wk +47%$1,637/wk
Rent$525/wk$385/wk +36%$330/wk
Mortgage repayment$2,544/mo$1,965/mo +29%$1,733/mo
Median age4043 −3 yrs42
Rent share of household income21.0%22.6% −1.6 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 Mount Colah, the typical NSW suburb and the typical Australian suburb.

Mount Colah Population

7,816 residents at the 2021 Census.

Mount Colah Median Income & Rent

Median Income
$1,032/wk
$53,664 per year
Ranked 1,025 of 14,663
Median Rent
$525/wk
$2,275 per month
Ranked 492 of 14,663
Median Age
40years
2 years older than the national median
Mortgage
$2,544/mo
Avg household size: 2.9 · 0.9 per bedroom

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

Mount Colah Rent Prices & Affordability

21% of median household income goes on median rent

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

Household income $2,505/wk
Median rent $525/wk
Rent to income 21.0%

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

Median rent in Mount Colah against your income

About $10,855 a month
Median rent $525/wk
Left after rent $1,980/wk
Rent share 21.0%

Mount Colah Schools

8
schools nearby
7
government
1089
avg ICSEA score
2,928
total students
St Patrick's Catholic Primary School Catholic
Primary · K-6 · 223 students
1124
ICSEA
Asquith Public School Government
Primary · K-6 · 384 students
1102
ICSEA
Mount Colah Public School Government
Primary · K-6 · 442 students
1098
ICSEA
Ku-ring-gai High School Government
Secondary · 7-12 · 536 students
1088
ICSEA
Mount Kuring-gai Public School Government
Primary · K-6 · 132 students
1083
ICSEA
Asquith High School Government
Secondary · 7-12 · 669 students
1082
ICSEA
Hornsby High School Government
Secondary · 7-12 · 542 students
1045
ICSEA
Gibberagong Environmental Education Centre Government
Combined

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

All schools near Mount Colah, with a map

Mount Colah Map

Mount Colah, New South Wales Map data: OpenStreetMap
Loading map…

Mount Colah, New South Wales: 33.6649°S, 151.1320°E

Mount Colah Circle size: offences per 1,000 residents Schools (8)

People in Mount Colah

Demographics

Gender Split

Male 50.1% (3,915) Female 49.9% (3,895)

Population Density

707
people per km²
7,816 people · 11.1 km²

Households

2.9
Avg household size
0.9
Persons per bedroom
$2,805
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
4.1%
India
3.7%
China
3.2%
Philippines
2.0%
Iran
1.9%
New Zealand
1.7%
South Africa
1.3%

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

Most common languages at home other than English

Mandarin
3.9%
Persian (excluding Dari)
2.3%
Hindi
1.4%
Cantonese
1.3%
Spanish
1.1%
Korean
1.0%
Tagalog
1.0%

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

Ancestry

English
33.8%
Australian
31.8%
Irish
9.6%
Scottish
9.4%
Chinese
7.0%
Indian
4.6%
Italian
3.8%
German
3.5%
Filipino
2.8%
Dutch
1.8%
Korean
1.1%

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
40.1%
Catholic
20.9%
Anglican
12.6%
Hinduism
3.8%
Not stated
3.5%
Uniting Church
3.4%
Christian (other)
2.3%
Buddhism
2.3%

Source: ABS Census 2021, G14 Religion by SAL

Indigenous Population

0.9%
Aboriginal & Torres Strait Islander

Source: ABS Census 2021, G07 Indigenous Status by SAL

Marital Status

Married
56.6% 3,542
Separated
2.4% 153
Divorced
7.0% 436
Widowed
3.5% 218
Never married
30.5% 1,905

Source: ABS Census 2021, G05 Marital Status by SAL

Family Structure

Couple: children under 15
45.7%
Couple: no children under 15
23.5%
Couple: no children
21.2%
One parent: no children under 15
5.2%
One parent: children under 15
4.3%

Source: ABS Census 2021, G29 Family Composition by SAL

Household Size

1 person
15.3%
2 persons
30.0%
3 persons
20.6%
4 persons
23.1%
5 persons
7.7%
6+ persons
3.3%

Source: ABS Census 2021, G35 Household Size by SAL

Homes in Mount Colah

Housing Tenure

Of the 2,664 occupied private dwellings in Mount Colah at the 2021 Census, 17.8% were rented, 33.0% owned outright and 48.4% owned with a mortgage.

Other tenure type
0.3% 9 dwellings
Owned outright
33.0% 880 dwellings
Owned with mortgage
48.4% 1,289 dwellings
Rented
17.8% 473 dwellings
Tenure type not stated
0.8% 20 dwellings

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

Dwelling Types

Separate house
95.6%
Semi-detached (2+ storey)
3.3%
Semi-detached (1 storey)
1.1%

Source: ABS Census 2021, G36 Dwelling Structure by SAL

Number of Bedrooms

1 bedroom
4.5%
2 bedrooms
12.1%
3 bedrooms
35.3%
4 bedrooms
35.9%
5 bedrooms
10.6%
6+ bedrooms
1.6%

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

Monthly Mortgage Repayments

$0-$299/mo
5.7%
$300-$449/mo
0.8%
$450-$599/mo
1.9%
$600-$799/mo
1.4%
$800-$999/mo
1.2%
$1,000-$1,399/mo
7.4%
$1,400-$1,799/mo
11.2%
$1,800-$2,399/mo
25.3%
$2,400-$2,999/mo
19.1%
$3,000-$3,999/mo
26.1%

Source: ABS Census 2021, G38 Mortgage Repayment by SAL

Car Ownership

0 vehicles
3.7%
1 vehicle
33.7%
2 vehicles
41.6%
3 vehicles
13.9%
4+ vehicles
7.1%

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

Work, income and education in Mount Colah

Employment

Employed full-time
43.9% 2,523 people
Employed part-time
22.6% 1,296 people
Unemployed
2.7% 157 people
Not in labour force
30.8% 1,771 people

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

Occupation

Professionals
37.9%
Managers
17.7%
Clerical & Administrative
12.7%
Technicians & Trade Workers
11.9%
Community & Personal Service
9.4%
Sales Workers
4.3%
Labourers
3.7%
Machinery Operators & Drivers
2.4%

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

Weekly Household Income

Nil/Negative/wk
1.1%
$1-$149/wk
0.3%
$150-$299/wk
0.5%
$300-$399/wk
0.9%
$400-$499/wk
2.9%
$500-$649/wk
1.7%
$650-$799/wk
3.2%
$800-$999/wk
4.4%
$1,000-$1,249/wk
5.1%
$1,250-$1,499/wk
7.1%
$1,500-$1,749/wk
5.6%
$1,750-$1,999/wk
5.4%
$2,000-$2,499/wk
11.7%
$2,500-$2,999/wk
8.9%
$3,000-$3,499/wk
9.6%
$3,500-$3,999/wk
7.0%
$4,000+/wk
24.5%

Source: ABS Census 2021, G33 Household Income by SAL

Personal Weekly Income Distribution

$0 or less/wk
11.4%
$1-$149/wk
4.5%
$150-$299/wk
4.9%
$300-$399/wk
2.6%
$400-$499/wk
2.0%
$500-$649/wk
2.7%
$650-$799/wk
7.1%
$800-$999/wk
7.9%
$1,000-$1,249/wk
10.3%
$1,250-$1,499/wk
9.2%
$1,500-$1,749/wk
8.2%
$1,750-$1,999/wk
6.9%
$2,000-$2,999/wk
13.4%
$3,000-$3,499/wk
3.4%
$3,500+/wk
5.6%

Source: ABS Census 2021, G17 Personal Income by SAL

How People Get to Work

Car (driver)
63.3%
Did not go to work
23.3%
Car (passenger)
4.1%
Train
4.1%
Walked only
2.2%
Truck
1.2%
Other
0.8%
Motorbike/Scooter
0.5%
Bicycle
0.3%
Bus
0.1%

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

Education Level

Year 12 or equivalent
77.9%
Year 10 or equivalent
15.9%
Year 11 or equivalent
4.0%
Year 9 or equivalent
2.2%

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
38.2%
Certificate III/IV
21.9%
Advanced Diploma/Diploma
17.7%
Postgraduate Degree
15.1%
Graduate Diploma/Certificate
5.4%
Certificate I/II
1.6%

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

Field of Study

Management & Commerce
24.5%
Engineering
14.4%
Society & Culture
11.6%
Health
10.6%
Education
9.5%
Information Technology
8.4%
Architecture & Building
5.9%
Creative Arts
5.2%
Natural & Physical Sciences
4.3%
Food, Hospitality & Personal Services
3.7%
Agriculture & Environment
1.8%

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

School & University Attendance

Primary: Government
32.8%
Secondary: Government
24.3%
Vocational Education
11.2%
Pre-school
11.0%
Secondary: Catholic
8.4%
Primary: Catholic
5.4%
Secondary: Other Non-Govt
4.3%
Primary: Other Non-Govt
2.8%

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
3.7%
Need for assistance not stated
1.8%

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

Long-term Health Conditions

Mental health
598
Asthma
318
Arthritis
200
Diabetes
187
Heart disease
137
Cancer
99
Lung condition
81
Kidney disease
56
Stroke
42
Dementia
12

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

Unpaid Carers

Provided unpaid assistance
12.5% 769
Did not provide
87.5% 5,359

Source: ABS Census 2021, G25 Unpaid Assistance by SAL

Volunteering

Volunteer
17.6% 1,076
Not a volunteer
82.4% 5,044

Source: ABS Census 2021, G23 Voluntary Work by SAL

Military Service

Current ADF: Regular
0.1% 4
Current ADF: Reserves
0.0% 3
Previously served
1.5% 93
Never served
98.4% 6,039

Source: ABS Census 2021, G22 ADF Service by SAL

Children Ever Born

No children
32.1%
1 child
14.1%
2 children
34.1%
3 children
14.7%
4 children
4.6%
5+ children
0.4%

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

When Migrants Arrived

Before 1951
14
1951: 1960
50
1961: 1970
146
1971: 1980
209
1981: 1990
369
1991: 2000
415
2001: 2010
649
2011: 2015
364
2016
94
2017
56
2018
77
2019
69
2020
19
2021
5

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

Population Mobility

11.3%
moved in the last year
33.5%
moved in the last 5 years
3.5%
unemployment rate (Census)
69.9%
labour force participation

Source: ABS Census 2021, G43 Summary by SAL

Where Residents Moved From

Same address
6,749
Moved from NSW
563
Moved: same area (SA2)
244
Moved from overseas
31
Moved from QLD
8
Moved from VIC
4

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

Unpaid Domestic Work

Less than 5 hours
21.9%
5: 14 hours
33.0%
15: 29 hours
15.8%
30+ hours
9.3%
Did not do domestic work
20.1%

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

Family Blending

Intact family: no other children
90.3%
Step family: no other children
6.4%
Blended family: no other children
2.0%
Intact family: other children present
0.6%
Other couple: children only
0.5%
Step family: other children present
0.2%

Source: ABS Census 2021, G31 Family Blending by SAL

Mount Colah Crime Statistics

27 reported offences in 2025-26, by category.

Theft
11
Assault
4
Other Against Person
3
Property Damage
3
Other Against Property
3
Traffic
2
Sexual Offences
1

Total offences by year

2020
2021
2022
2023
2024
2025

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

Cheaper alternatives with similar incomes

East Albury
Income: $858/wk Rent: $280/wk $245/wk less rent
East Tamworth
Income: $915/wk Rent: $325/wk $200/wk less rent
Lochinvar
Income: $889/wk Rent: $370/wk $155/wk less rent
Bulli
Income: $952/wk Rent: $370/wk $155/wk less rent
Lambton
Income: $846/wk Rent: $380/wk $145/wk less rent
Tatton
Income: $1,009/wk Rent: $385/wk $140/wk less rent
Tingira Heights
Income: $826/wk Rent: $400/wk $125/wk less rent
Floraville
Income: $885/wk Rent: $405/wk $120/wk less rent

Suburbs near Mount Colah

The closest suburb to Mount Colah is Mount Kuring-Gai, 2.5 km away.

Mount Kuring-Gai
2.5 km away · income $961/wk · rent $568/wk
Asquith
2.8 km away · income $1,041/wk · rent $490/wk
Hornsby Heights
3.1 km away · income $967/wk · rent $620/wk
North Turramurra
3.5 km away · income $886/wk · rent $760/wk
North Wahroonga
3.5 km away · income $1,039/wk · rent $950/wk
Berowra
4.4 km away · income $998/wk · rent $580/wk

Compare Mount Colah

Frequently Asked Questions About Mount Colah

What is the population of Mount Colah NSW?

The population of Mount Colah NSW is 7,816 according to the ABS Census 2021. The suburb has a population density of 707 people per km². Mount Colah is ranked #912 out of 14,663 suburbs by population.

What is the median income in Mount Colah?

The median personal income in Mount Colah NSW is $1,032 per week, or $53,664 per year. The median household income is $2,505 per week. Family income is $2,805 per week. Mount Colah is ranked #1,025 by income out of 14,663 Australian suburbs.

How much is rent in Mount Colah?

Median rent in Mount Colah NSW is $525 per week ($2,275 per month). Rent represents 21.0% of household income, which is considered affordable. Mount Colah ranks #492 out of 14,663 suburbs by rent.

What are mortgage repayments in Mount Colah?

The median monthly mortgage repayment in Mount Colah NSW is $2,544. This data comes from the ABS Census 2021 and reflects mortgage repayments for owner-occupied dwellings.

What is the median age in Mount Colah?

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

Is Mount Colah a good suburb to live in?

Mount Colah is a suburb in New South Wales with a population of 7,816. The median income is $1,032/wk, which is above the typical NSW suburb ($765/wk). Rent affordability is rated as affordable (21.0% 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: 12761. All dollar figures in AUD.