Aerial view

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The quick read on

St Marys

SA 5042 · Mitcham

What homes cost, how rents have moved, and a feel for the people who call it home.

Median house: $1,040,000
Median unit: $505,000
Population: 3,010
Postcode: 5042

Property market insights for St Marys (SA)

Median sale price and rental income of properties in St Marys (SA) SA

Median price trend for houses

Based on 33 sales in the preceding 12 months

$1,040,000

Up 9.2% over 12 months

2 bed: $750k
3 bed: $1.04m
4 bed: $1.1m

Median rent trend for houses

Based on 31 rental listings in the preceding 12 months

$675 per week

Up 12.5% over 12 months

Market data updated October 2026.

The median house price in St Marys (SA), SA is currently $1,040,000, based on the latest 12 months of sales. St Marys (SA) has a 12-month growth rate of 9.2% for houses and 5.2% for units.

Two-bedroom houses have a median sale price of $750,000, Three-bedroom houses have a median sale price of $1,040,000, Four-bedroom houses have a median sale price of $1,100,000 in St Marys (SA).

If you're looking to lease, the median rent for houses in St Marys (SA) is $675 per week. The median house rent has increased 12.5% over the last 12 months.

The median price of apartments and units for sale in St Marys (SA) is $505,000, which has increased 5.2% since the same time last year. One-bedroom apartments and units have a median sale price of $398,000, Two-bedroom apartments and units have a median sale price of $540,000 in St Marys (SA). The median rent for units and apartments in St Marys (SA) is $450 per week and has remained unchanged over the last 12 months.

Crime and safety

Is St Marys safe?

The overall rate for St Marys is 4,638 offences per 100,000 residents — 23% above the Greater Adelaide benchmark.

That is the clearest suburb-wide answer. Open the detailed profile to see how the pattern changes across offence types and different parts of St Marys.

See the detailed St Marys crime profile →How to read crime data

Overall crime rate

4,638

offences per 100,000 residents

23% aboveGreater Adelaide

St MarysGreater Adelaide: 3,761

Suburb-wide estimate from Microburbs' public crime model; it is not an address-level measure.

The people behind the postcode

Who lives in St Marys?

St Marys SA 5042 is in South Australia, within Greater Adelaide.

3,010 people call St Marys home, with an average of 2.4 people per household and a median household income of $1,490 a week.

Public ABS 2021 Census figures. The bars compare the local share with the capital-region benchmark.

Population: 3,010
Median age: 35 years
Median mortgage: $1,654 / month
2021 household rent: $285 / week

Above the benchmarkBelow the benchmarkIn lineGreater Adelaide benchmark

Age profile

Share of residents in each age band.

Under 1516.5%Below

15–3432.9%Above

35–5426.9%Above

55–7417.3%Below

75 and over6.4%Below

Homes

Share of occupied private dwellings.

Separate houses66.5%Below

Townhouses22.8%Above

Apartments11.0%Above

Ownership

Share of homes with a stated ownership or rental status.

Owned outright24.9%Below

Paying a mortgage38.5%In line

Renting36.5%Above

Cars at home

Vehicles available to occupied households.

No car8.2%Above

One car40.0%Above

Two cars38.0%Above

Three or more14.1%Below

Getting to work

Selected ways residents worked or travelled on Census day.

Worked from home9.1%Below

Drove to work61.4%Below

Train, tram or bus6.2%Above

Walked or cycled2.1%Below

What stands out in St Marys

9.1% of workers in St Marys worked from home on Census day.

6.2% of St Marys residents were born in India, about twice the rate across Greater Adelaide.

37.0% of people in St Marys described themselves as having no religion in the 2021 Census.

A closer look at the Census

Questions people ask about St Marys

Open any question for a plain-English reading of the public 2021 Census for St Marys SA 5042.

Is St Marys family-friendly?Age, family structure and household size describe the community families would be joining.

16.5% of St Marys's residents were children under 15 in the 2021 Census. That is close to the Greater Adelaide average.

795 family households lived in St Marys; 43.6% were couple families and 16.7% were one-parent families.

37.5% of local families included children under 15. That is close to the Greater Adelaide average.

These are suburb-wide household figures, not school or childcare ratings.

What is the age profile of St Marys?The balance between younger adults, families and older residents changes how a suburb feels day to day.

St Marys had 3,010 residents at the 2021 Census.

37.3% of residents were aged 25 to 44.

23.8% were 55 or older. That is well below the Greater Adelaide average.

Age shares use the suburb’s total Census population.

What kind of homes are in St Marys?The dwelling mix shows whether the suburb is mostly detached homes, townhouses or apartments.

Separate houses made up 66.5% of occupied private dwellings in St Marys.

Townhouses and other attached homes represented 22.8% of occupied private dwellings.

Flats and apartments accounted for 11.0% of occupied private dwellings.

All three shares use occupied private dwellings as the denominator.

Do people own or rent in St Marys?Tenure shows how many households own outright, have a mortgage or rent.

24.9% of households with a stated tenure owned their home outright. That is well below the Greater Adelaide average.

38.5% were buying their home with a mortgage.

36.5% rented their home. That is well above the Greater Adelaide average.

Tenure shares include households that stated one of these three arrangements.

How large are households in St Marys?Household-size data shows the mix behind the suburb-wide average.

The average household in St Marys had 2.4 people.

One-person households made up 31.5% of occupied homes. That is somewhat above the Greater Adelaide average.

Two-person households represented 32.5%, while 20.3% had four or more usual residents.

Household size counts usual residents in occupied homes.

How do people get to work in St Marys?Census-day travel shows the balance between home, road, public transport and active travel.

9.1% of workers worked from home on Census day. That is close to the Greater Adelaide average.

61.4% drove a car as their only travel method. That is close to the Greater Adelaide average.

6.2% used only a train, tram or bus, while 2.1% walked or cycled.

Travel figures are a 2021 Census-day snapshot.

How many cars do households have in St Marys?Vehicle availability helps describe the routines local households can support.

8.2% of occupied households had no motor vehicle available. That is close to the Greater Adelaide average.

One-car households formed 40.0% of the total.

52.0% of households had two or more vehicles.

Vehicle counts refer to occupied households, not individual residents.

Who's moving to St Marys, and who stays?Address history shows how settled or recently mobile residents were at the Census date.

51.6% were at the same address five years earlier, while 48.4% reported a different address.

34.3% of residents were born outside Australia. That is well above the Greater Adelaide average.

Mobility figures cover residents who answered the relevant Census question.

What languages are spoken in St Marys?Language at home gives a direct view of the community’s everyday linguistic mix.

62.8% of residents used only English at home.

33.6% used a language other than English at home.

2.4% spoke Mandarin at home, 0.9% spoke Cantonese and 1.4% spoke Hindi.

Home language is separate from English proficiency.

Where were St Marys residents born?Birthplace adds another layer to the local story, separate from ancestry and language.

34.3% of St Marys's population was born outside Australia, while roughly 65.7% was born in Australia.

1.9% of residents were born in China.

6.2% were born in India, while Australian citizenship across the whole suburb stood at 80.6%.

Birthplace, citizenship and ancestry describe different parts of identity.

What ancestries shape St Marys?Ancestry responses show how residents describe family and cultural background.

English ancestry accounted for 30.8% of ancestry responses in St Marys.

Australian ancestry made up 27.3% of responses.

Chinese ancestry represented 4.2% of responses.

People may nominate more than one ancestry, so these are shares of responses.

What work do people do in St Marys?Occupation describes a person’s role; industry describes the sector employing them.

27.4% of employed residents worked in professional occupations. That is somewhat above the Greater Adelaide average.

Managers accounted for 10.6% of employed residents, while clerical and administrative workers made up 10.3%.

Health care and social assistance employed 24.9% of workers, and education and training employed 8.2%.

Occupation and industry figures describe employed residents of the suburb.

How active is the workforce in St Marys?Participation, employment pattern and unemployment describe the resident labour force.

The labour-force participation rate was 67.3%, compared with 61.7% across Greater Adelaide.

35.2% of residents aged 15 and over worked full time, while 25.0% worked part time.

Unemployment was 6.1%, compared with 5.5% across Greater Adelaide.

Labour-force figures come from the 2021 Census.

What does the health profile of St Marys show?Selected long-term health conditions help describe community service needs.

63.9% reported no selected long-term health condition.

8.9% reported a long-term mental health condition, including depression or anxiety.

7.5% reported asthma, 6.5% arthritis and 4.8% diabetes excluding gestational diabetes.

These are self-reported suburb-wide Census figures, not address-level health risks.

How educated is St Marys?Qualifications describe the study pathways represented among local residents.

33.5% of people in the qualifications table held a bachelor degree. That is somewhat above the Greater Adelaide average.

Postgraduate degrees accounted for 13.7% of qualification responses.

Diploma-level qualifications represented 13.9%, while certificate-level qualifications represented 27.3%.

Qualification categories are reported separately and are not school ratings.

What do incomes and housing costs look like in St Marys?Census income and household payments give historical context for local living costs.

Median household income was $1,490 per week in the 2021 Census.

The median monthly mortgage repayment reported by local households was $1,654.

Occupied renting households reported a median rent of $285 per week.

These household figures are from 2021; current sale and asking-rent medians appear in the market section.

How does St Marys compare with Greater Adelaide?A few clear differences place the suburb in its wider metropolitan context.

Working from home was 9.1% in St Marys, compared with 9.8% across Greater Adelaide.

Outright ownership was 24.9% locally and 32.1% across Greater Adelaide. That is well below the Greater Adelaide average.

Renting accounted for 36.5% in St Marys, against 29.5% across Greater Adelaide.

Capital-region comparisons use the same Census definitions and year.

Three useful questions

A buyer’s quick guide to St Marys (SA)

Is St Marys (SA) expensive?

The median house price is $1,040,000, while units and apartments sit at $505,000. Bedroom count, land and condition still create a wide range around those suburb medians.

Is St Marys (SA) good for families?

The Census counted 795 local families, and 16.5% of residents were under 15. That describes the community; school quality, travel times and the right fit for a particular family need separate research.

What can I get for $1.5m in St Marys (SA)?

4-bedroom houses have a median around $1,100,000, the closest bedroom benchmark we hold to a $1.5m budget. Individual homes can differ substantially with block size, renovation and location.

Medians describe recorded market activity across the suburb; they are historical context, not a valuation or forecast for an individual home.

Explore the area

Streets and suburbs around St Marys (SA)

44 streets in St Marys (SA)

Street-by-street reports are not published yet. The streets below are the ones this suburb covers.

Adelaide Tce
Alfred St
Auricchio Ave
Ayliffes Rd
Bailey St
Barnett Ave
Benjamin St
Brookman Ave
Cashel St
Comaum St
Crystal Ave
Daws Rd
Day Dr
Denis St
Donald St
Dorene St
Graske Rd
Julia Ave

Show all 44 streets

Kiana St
Kiley Ct
Laura Ave
Lloyd St
Manse Tce
Merriton Ave
Mingbool Ave
Norman Court
Norman St
Osborne St
Park Rd
Paul St
Pinn St
Quinlan Ave
Ragless St
Rothesay Ave
Shepherds Hill Rd
Southern Ave
South Rd
Stanlake Ave
St Marys St
Styles Ave
The Crescent
Thurles St
Tobruk Ave
Walsh Ave

12 suburbs surrounding St Marys (SA)

Compare nearby suburb prices, rents and five-year market trends.

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Figures update as new market and census data arrives. This suburb overview is general information, not a valuation or financial advice.