Suburbs St Marys (SA)

South Australia · Suburb Profile

St Marys SA — Suburb Profile

Population, median income, rent prices, housing costs and demographics for St Marys, South Australia. ABS Census 2021.

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 1643.5 people per km².

The most common overseas birthplace in St Marys is India. The most common religion is No Religion (45% of residents). After English, the most spoken language is IAL 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).

St Marys Map

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📍 St Marys, South Australia — 35.0037°S, 138.5802°E

Crime: Low Med High 🏫 Schools (25)

St Marys Population

0
residents (Census 2021)

St Marys Median Income & Rent

💰
Median Income
$785/wk
$40,820 per year
#3839 of 14,663
🏠
Median Rent
$285/wk
$1,235 per month
#5291 of 14,663
👤
Median Age
35years
3 years younger than national median
🏡
Mortgage
$1,654/mo
Avg household size: 2.4 · 0.8 per bedroom

St Marys Demographics

Gender Split

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

Population Density

1643.5
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

St Marys 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)

St Marys Housing Tenure

🏠
Owned outright
39.3% 305 dwellings
🏦
Owned with mortgage
60.7% 471 dwellings

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

St Marys Country of Birth

Australia
81.4%
India
8.7%
England
2.9%
China
2.4%
Iran
1.1%
Bangladesh
1.0%
Greece
1.0%
Germany
0.6%
Indonesia
0.6%
Bosnia & Herzegovina
0.4%

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

St Marys Religion

No Religion
44.6%
Catholic
19.0%
Hinduism
7.2%
Not stated
6.8%
Islam
6.6%
Anglican
6.1%
Eastern Orthodox
5.2%
Baptist
4.4%

Source: ABS Census 2021 G14 — Religion by SAL

St Marys 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%

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

St Marys Languages Spoken at Home

IAL Nepali
17.1%
Other
16.2%
Mandarin
13.7%
Arabic
12.1%
IAL Punjabi
11.8%
Malayalam
10.3%
Greek
9.3%
SAL Tot
9.3%

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

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

St Marys 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

St Marys 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

St Marys 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

St Marys 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

St Marys 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

St Marys 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

St Marys Ancestry

English
25.3%
Australian
22.4%
Other
16.1%
Scottish
6.7%
Irish
5.5%
Indian
5.3%
German
4.9%
Italian
3.7%
Greek
3.5%
Chinese
3.4%
Filipino
1.9%
Dutch
1.3%

Source: ABS Census 2021 G08 — Ancestry by SAL

St Marys 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

St Marys Need for Assistance

♿
Needs assistance
6.0% 350
✅
No need for assistance
94.0% 5,446

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

St Marys Volunteering

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

Source: ABS Census 2021 G23 — Voluntary Work by SAL

St Marys 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

St Marys 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

St Marys 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

St Marys 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

St Marys 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

St Marys Indigenous Population

1.3%
Aboriginal & Torres Strait Islander
75
Indigenous residents
5,770
Non-Indigenous residents

Source: ABS Census 2021 G07 — Indigenous Status by SAL

St Marys 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

St Marys 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

St Marys 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

St Marys Military Service

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

Source: ABS Census 2021 G22 — ADF Service by SAL

St Marys Unpaid Carers

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

Source: ABS Census 2021 G25 — Unpaid Assistance by SAL

St Marys 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

St Marys 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

St Marys 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

St Marys 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

St Marys 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

St Marys 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

Reported offences in 2025-26 — 136 total

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

Offence trend by year:

2021
2022
2023
2024
2025

Source: SA Government Open Data — data.sa.gov.au

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

View all schools in St Marys with map →

St Marys Rent Prices & Affordability

19%
of income
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.

If you earn X in St Marys

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

Cheaper alternatives with similar incomes

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

St Marys vs State & National Average

Nearby Suburbs in SA

Firle
Pop: 1,508 Income: $735/wk Rent: $350/wk
Maylands (SA)
Pop: 1,508 Income: $1,018/wk Rent: $338/wk
Netherby (SA)
Pop: 1,510 Income: $1,028/wk Rent: $380/wk
Gilberton (SA)
Pop: 1,528 Income: $1,064/wk Rent: $344/wk
Old Noarlunga
Pop: 1,531 Income: $704/wk Rent: $305/wk
Hampstead Gardens
Pop: 1,535 Income: $761/wk Rent: $300/wk

Compare St Marys (SA)

St Marys (SA) vs Firle →St Marys (SA) vs Maylands (SA) →St Marys (SA) vs Netherby (SA) →St Marys (SA) vs Gilberton (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 1643.5 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 SA average of $763/wk.Rent affordability is rated as affordable (19.1% 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: 41373. All dollar figures in AUD.