St Marys, SA: suburb profile

The population of St Marys SA is 3,010 according to the 2021 Census. The median personal income in St Marys is $785 per week ($40,820 per year). Median rent in St Marys is $285 per week ($1,235 per month). St Marys has a median age of 35 years, younger than the national median of 38. St Marys has a population density of 1,643 people per km².

The most common overseas birthplace in St Marys is India. The most common religion is No religion (37.0% of residents). After English, the most spoken language is Nepali. The median monthly mortgage repayment in St Marys is $1,654.

There were 136 recorded offences in St Marys in 2025-26, a rate of 45 offences per 1,000 people. The most common offence category was theft (98 offences).

Population
3,010
Census 2021
Median income
$785/wk
Personal, Census 2021
Median rent
$285/wk
Weekly, Census 2021
Median age
35years
Census 2021

Valid: Census 2021 · Source: ABS Census of Population and Housing 2021; offences from SA Government Open Data (data.sa.gov.au), 2025-26.

St Marys vs the typical SA suburb

The median personal income in St Marys is $785 a week, 3% above the typical SA suburb ($759). That ranks 301st of 710 SA suburbs with 200 or more residents. Median rent is $285 a week, $15 less than the typical SA suburb. Rent takes 19.1% of the median household income here, against 19.5% in the typical SA suburb. The median resident is 35, 8 years younger than in the typical SA suburb (43).

The typical suburb is the median across suburbs with 200 or more residents. ABS Census 2021, calculated by GDP.com.au.
MeasureSt MarysTypical SADifferenceTypical Australia
Personal income$785/wk$759/wk +3%$766/wk
Household income$1,490/wk$1,494/wk −0%$1,637/wk
Rent$285/wk$300/wk −5%$330/wk
Mortgage repayment$1,654/mo$1,534/mo +8%$1,733/mo
Median age3543 −8 yrs42
Rent share of household income19.1%19.5% −0.3 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 St Marys, the typical SA suburb and the typical Australian suburb.

St Marys Population

3,010 residents at the 2021 Census.

St Marys Median Income & Rent

Median Income
$785/wk
$40,820 per year
Ranked 3,839 of 14,663
Median Rent
$285/wk
$1,235 per month
Ranked 5,291 of 14,663
Median Age
35years
3 years younger than the national median
Mortgage
$1,654/mo
Avg household size: 2.4 · 0.8 per bedroom

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

St Marys Rent Prices & Affordability

19% of median household income goes on median rent

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

Household income $1,490/wk
Median rent $285/wk
Rent to income 19.1%

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

Median rent in St Marys against your income

About $6,457 a month
Median rent $285/wk
Left after rent $1,205/wk
Rent share 19.1%

St Marys Schools

25
schools nearby
16
government
1067
avg ICSEA score
7,807
total students
Westminster School Independent
Combined · R-12 · 1,401 students
1139
ICSEA
Colonel Light Gardens Primary School Government
Primary · R-6 · 688 students
1119
ICSEA
Concordia College (St Peters Campus, Blackwood) Independent
Primary · R-6 · 88 students
1119
ICSEA
Eden Hills Primary School Government
Primary · R-6 · 229 students
1116
ICSEA
Australian Science and Mathematics School Government
Secondary · 10-12 · 419 students
1101
ICSEA
Edwardstown Primary School Government
Primary · R-6 · 512 students
1098
ICSEA
Clapham Primary School Government
Primary · U, R-6 · 243 students
1098
ICSEA
Blackwood Primary School Government
Primary · R-6 · 363 students
1095
ICSEA
Sunrise Christian School Marion Independent
Combined · R-9 · 320 students
1090
ICSEA
Bellevue Heights Primary School Government
Primary · U, R-6 · 177 students
1090
ICSEA
St Therese School Catholic
Primary · R-6 · 172 students
1087
ICSEA
St Bernadette's School Catholic
Primary · R-6 · 205 students
1085
ICSEA
Suneden Specialist School Independent
Combined · U · 72 students
1065
ICSEA
Blackwood High School Government
Secondary · 7-12 · 1,211 students
1059
ICSEA
Clovelly Park Primary School Government
Primary · U, R-6 · 222 students
1038
ICSEA

Showing 15 of 25 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 St Marys, with a map

St Marys Map

St Marys, South Australia Map data: OpenStreetMap
Loading map…

St Marys, South Australia: 35.0037°S, 138.5802°E

St Marys Circle size: offences per 1,000 residents Schools (25)

People in St Marys

Demographics

Gender Split

Male 49.9% (1,503) Female 50.1% (1,511)

Population Density

1,643
people per km²
3,010 people · 1.8 km²

Households

2.4
Avg household size
0.8
Persons per bedroom
$2,002
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

India
6.2%
Nepal
2.7%
England
2.2%
China
1.9%
Philippines
1.8%
Sri Lanka
1.3%
Vietnam
1.2%

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

Most common languages at home other than English

Nepali
3.3%
Punjabi
2.5%
Mandarin
2.4%
Greek
2.3%
Arabic
2.2%
Malayalam
2.1%
Hindi
1.4%

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

Ancestry

English
30.8%
Australian
27.3%
Scottish
8.2%
Irish
6.6%
Indian
6.4%
German
6.0%
Italian
4.5%
Greek
4.3%
Chinese
4.2%
Filipino
2.3%
Dutch
1.5%

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
37.0%
Catholic
15.8%
Hinduism
6.0%
Not stated
5.6%
Islam
5.5%
Anglican
5.1%
Eastern Orthodox
4.4%
Baptist
3.7%

Source: ABS Census 2021, G14 Religion by SAL

Indigenous Population

1.2%
Aboriginal & Torres Strait Islander

Source: ABS Census 2021, G07 Indigenous Status by SAL

Marital Status

Married
41.5% 1,041
Separated
3.0% 74
Divorced
8.8% 221
Widowed
4.8% 121
Never married
41.9% 1,050

Source: ABS Census 2021, G05 Marital Status by SAL

Family Structure

Couple: children under 15
44.8%
Couple: no children
26.4%
Couple: no children under 15
14.7%
One parent: no children under 15
8.5%
One parent: children under 15
5.5%

Source: ABS Census 2021, G29 Family Composition by SAL

Household Size

1 person
31.3%
2 persons
32.3%
3 persons
16.2%
4 persons
13.3%
5 persons
4.6%
6+ persons
2.2%

Source: ABS Census 2021, G35 Household Size by SAL

Homes in St Marys

Housing Tenure

Of the 1,244 occupied private dwellings in St Marys at the 2021 Census, 35.9% were rented, 24.5% owned outright and 37.9% owned with a mortgage.

Other tenure type
0.9% 11 dwellings
Owned outright
24.5% 305 dwellings
Owned with mortgage
37.9% 471 dwellings
Rented
35.9% 447 dwellings
Tenure type not stated
1.2% 15 dwellings

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

Dwelling Types

Separate house
74.6%
Semi-detached (1 storey)
23.6%
Semi-detached (2+ storey)
1.8%

Source: ABS Census 2021, G36 Dwelling Structure by SAL

Number of Bedrooms

1 bedroom
3.7%
2 bedrooms
28.1%
3 bedrooms
48.9%
4 bedrooms
16.0%
5 bedrooms
2.7%
6+ bedrooms
0.7%

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

Monthly Mortgage Repayments

$0-$299/mo
6.8%
$300-$449/mo
0.7%
$450-$599/mo
2.3%
$600-$799/mo
3.6%
$800-$999/mo
6.1%
$1,000-$1,399/mo
18.3%
$1,400-$1,799/mo
21.3%
$1,800-$2,399/mo
28.5%
$2,400-$2,999/mo
8.1%
$3,000-$3,999/mo
4.3%

Source: ABS Census 2021, G38 Mortgage Repayment by SAL

Car Ownership

0 vehicles
8.2%
1 vehicle
39.9%
2 vehicles
37.9%
3 vehicles
9.7%
4+ vehicles
4.3%

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

Work, income and education in St Marys

Employment

Employed full-time
37.7% 884 people
Employed part-time
26.6% 624 people
Unemployed
4.3% 101 people
Not in labour force
31.3% 733 people

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

Occupation

Professionals
34.5%
Community & Personal Service
15.6%
Technicians & Trade Workers
14.4%
Managers
10.4%
Clerical & Administrative
10.1%
Labourers
6.5%
Machinery Operators & Drivers
4.6%
Sales Workers
4.0%

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

Weekly Household Income

Nil/Negative/wk
1.5%
$1-$149/wk
0.9%
$150-$299/wk
1.9%
$300-$399/wk
2.8%
$400-$499/wk
7.7%
$500-$649/wk
4.8%
$650-$799/wk
6.6%
$800-$999/wk
6.4%
$1,000-$1,249/wk
8.8%
$1,250-$1,499/wk
8.8%
$1,500-$1,749/wk
7.3%
$1,750-$1,999/wk
6.4%
$2,000-$2,499/wk
12.9%
$2,500-$2,999/wk
7.9%
$3,000-$3,499/wk
6.6%
$3,500-$3,999/wk
3.2%
$4,000+/wk
5.4%

Source: ABS Census 2021, G33 Household Income by SAL

Personal Weekly Income Distribution

$0 or less/wk
10.4%
$1-$149/wk
4.5%
$150-$299/wk
6.1%
$300-$399/wk
4.0%
$400-$499/wk
4.7%
$500-$649/wk
4.3%
$650-$799/wk
9.3%
$800-$999/wk
10.6%
$1,000-$1,249/wk
13.9%
$1,250-$1,499/wk
9.6%
$1,500-$1,749/wk
8.1%
$1,750-$1,999/wk
5.4%
$2,000-$2,999/wk
7.7%
$3,000-$3,499/wk
0.6%
$3,500+/wk
0.8%

Source: ABS Census 2021, G17 Personal Income by SAL

How People Get to Work

Car (driver)
70.6%
Did not go to work
11.9%
Bus
6.2%
Car (passenger)
5.5%
Walked only
1.5%
Motorbike/Scooter
0.9%
Bicycle
0.9%
Taxi/Rideshare
0.7%
Train
0.6%
Truck
0.5%
Other
0.4%
Tram/Light Rail
0.4%

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

Education Level

Year 12 or equivalent
72.7%
Year 11 or equivalent
13.1%
Year 10 or equivalent
11.0%
Year 9 or equivalent
3.2%

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
37.6%
Certificate III/IV
25.6%
Advanced Diploma/Diploma
15.6%
Postgraduate Degree
15.5%
Graduate Diploma/Certificate
3.6%
Certificate I/II
2.0%

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

Field of Study

Management & Commerce
20.6%
Health
16.8%
Society & Culture
13.7%
Engineering
13.5%
Education
7.8%
Information Technology
6.6%
Food, Hospitality & Personal Services
5.1%
Architecture & Building
5.1%
Natural & Physical Sciences
4.5%
Creative Arts
3.9%
Agriculture & Environment
2.3%

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

School & University Attendance

Primary: Government
28.4%
Secondary: Government
16.5%
Vocational Education
15.3%
Pre-school
12.3%
Primary: Catholic
10.3%
Secondary: Catholic
6.0%
Primary: Other Non-Govt
5.8%
Secondary: Other Non-Govt
5.2%

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
90.6%
Has need for assistance
5.8%
Need for assistance not stated
3.6%

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

Long-term Health Conditions

Mental health
277
Asthma
96
Arthritis
78
Diabetes
76
Heart disease
63
Lung condition
36
Cancer
31
Kidney disease
22
Stroke
21
Dementia
9

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

Unpaid Carers

Provided unpaid assistance
13.4% 322
Did not provide
86.6% 2,083

Source: ABS Census 2021, G25 Unpaid Assistance by SAL

Volunteering

Volunteer
17.5% 423
Not a volunteer
82.5% 1,994

Source: ABS Census 2021, G23 Voluntary Work by SAL

Military Service

Previously served
1.8% 43
Never served
98.2% 2,366

Source: ABS Census 2021, G22 ADF Service by SAL

Children Ever Born

No children
42.1%
1 child
14.2%
2 children
26.7%
3 children
11.4%
4 children
4.5%
5+ children
1.2%

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

When Migrants Arrived

Before 1951
17
1951: 1960
41
1961: 1970
65
1971: 1980
46
1981: 1990
57
1991: 2000
65
2001: 2010
252
2011: 2015
163
2016
50
2017
65
2018
63
2019
84
2020
40

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

Population Mobility

16.8%
moved in the last year
48.4%
moved in the last 5 years
6.1%
unemployment rate (Census)
67.3%
labour force participation

Source: ABS Census 2021, G43 Summary by SAL

Where Residents Moved From

Same address
2,377
Moved from SA
326
Moved: same area (SA2)
58
Moved from NSW
34
Moved from overseas
18
Moved from VIC
14
Moved from QLD
8
Moved from WA
3

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

Unpaid Domestic Work

Less than 5 hours
22.6%
5: 14 hours
30.0%
15: 29 hours
10.9%
30+ hours
9.6%
Did not do domestic work
26.9%

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

Family Blending

Intact family: no other children
88.2%
Step family: no other children
7.8%
Blended family: no other children
2.6%
Other couple: children only
1.4%

Source: ABS Census 2021, G31 Family Blending by SAL

St Marys Crime Statistics

136 reported offences in 2025-26, by category.

Theft
98
Property Damage
12
Break & Enter
9
Assault
8
Fraud
7
Other Against Person
2

Total offences by year

2021
2022
2023
2024
2025

Source: SA Government Open Data (data.sa.gov.au).

Cheaper alternatives with similar incomes

Stirling North
Income: $925/wk Rent: $250/wk $35/wk less rent
Ceduna
Income: $762/wk Rent: $200/wk $85/wk less rent
Renown Park
Income: $640/wk Rent: $250/wk $35/wk less rent
Edwardstown
Income: $744/wk Rent: $275/wk $10/wk less rent
Mallala
Income: $704/wk Rent: $278/wk $7/wk less rent
Mitchell Park (SA)
Income: $635/wk Rent: $278/wk $7/wk less rent
Park Holme
Income: $702/wk Rent: $280/wk $5/wk less rent
Noarlunga Downs
Income: $648/wk Rent: $250/wk $35/wk less rent

Suburbs near St Marys

The closest suburb to St Marys is Pasadena, 0.7 km away.

Pasadena
0.7 km away · income $701/wk · rent $333/wk
Clovelly Park
1.0 km away · income $755/wk · rent $358/wk
Mitchell Park (SA)
1.6 km away · income $635/wk · rent $278/wk
Panorama
1.6 km away · income $817/wk · rent $380/wk
Melrose Park (SA)
2.1 km away · income $832/wk · rent $350/wk
Daw Park
2.2 km away · income $797/wk · rent $300/wk

Compare St Marys (SA)

Frequently Asked Questions About St Marys

What is the population of St Marys SA?

The population of St Marys SA is 3,010 according to the ABS Census 2021. The suburb has a population density of 1,643 people per km². St Marys is ranked #2,407 out of 14,663 suburbs by population.

What is the median income in St Marys?

The median personal income in St Marys SA is $785 per week, or $40,820 per year. The median household income is $1,490 per week. Family income is $2,002 per week. St Marys is ranked #3,839 by income out of 14,663 Australian suburbs.

How much is rent in St Marys?

Median rent in St Marys SA is $285 per week ($1,235 per month). Rent represents 19.1% of household income, which is considered affordable. St Marys ranks #5,291 out of 14,663 suburbs by rent.

What are mortgage repayments in St Marys?

The median monthly mortgage repayment in St Marys SA is $1,654. This data comes from the ABS Census 2021 and reflects mortgage repayments for owner-occupied dwellings.

What is the median age in St Marys?

The median age in St Marys SA is 35 years. This is younger than the national median age of 38 years.

Is St Marys a good suburb to live in?

St Marys is a suburb in South Australia with a population of 3,010. The median income is $785/wk, which is above the typical SA suburb ($759/wk). Rent affordability is rated as affordable (19.1% of household income). See the full suburb profile above for detailed statistics.

Explore More

Australian Average Salary Australian House Prices Adelaide Cost of Living

Data: Australian Bureau of Statistics, Census of Population and Housing 2021. SA2 area: 41373. All dollar figures in AUD.