St Marys SA 5042
Located in South Australia, St Marys sits 10 km from Adelaide CBD, around 17 minutes by car. The suburb has 3,010 residents, a median age of 35, and a median household income of $77,480 per year. On socioeconomic measures it sits in the middle range nationally. Population grew 9.1% from 2016 to 2021. The 2021 Census recorded a median rent of $285 per week and a median monthly mortgage of $1,654. The area shows high crime risk and high flood risk. 1 school sits within the suburb boundary, and walkability is moderate.
Is St Marys a good suburb?
St Marys scores a C (39/100) on SuburbScan's Liveability grade — strong on transit, weaker on safety.
Mixed results
1 school
Walkable and central
Walkability 65/100 · 10.5 km · 17 min drive to Adelaide
Around the state median
Median $1M
High crime risk
Fire 21/100 · Crime 85/100 · Flood 81/100
Mid-range socio-economic
SEIFA decile 6/10 · median age 35 · 3,010 residents
Liveability Rating
39 / 100 · Ranked #389 in SAEach bar is St Marys's rank among SA suburbs, from 0 to 100 (higher is better). Scored on 4 of 5 factors: no school data, so the other factors carry its weight.
How do you rate the liveability in St Marys?
Local knowledge beats any dataset. Rate it and see what other residents think.
Our score
39 / 100
From schools, safety and socio-economic data — not opinion.
Residents say
…
Median House Price
Public listings dataSt Marys's house market is moving lower: the median sale price reached $1 million, about 2% below where it sat a year earlier.
Houses
$1,000,000
In line with its 6 neighbours (median $980,500)
Based on 48 recorded sales in the last 24 months.
Typically sold in 18 days — median across 18 sales that recorded a listing period
By bedrooms
- 2 bed 5 sales $708K
- 3 bed 27 sales $980K
- 4 bed 13 sales $1.1M
Units
$522,500
9% above its 3 neighbours (median $478,750)
Based on 24 recorded sales in the last 24 months.
Typically sold in 15 days — median across 11 sales that recorded a listing period
By bedrooms
- 2 bed 18 sales $505K
Currently for Sale
Last 6 monthsHouses in St Marys are currently listed at around $1.03 million on average. Based on 4 houses listed in the past six months.
Houses
$1.03M
4 houses listed in the last 6 months.
Units
$575K
7 units listed in the last 6 months.
11 of the suburb's 1,244 dwellings (0.9%) were listed for sale in the last 6 months.
Rental Market
Advertised rents · last 6 monthsHouses in St Marys rent for around $735 a week on average, based on 8 houses listed for rent in the past six months.
Houses
$735/wk
8 houses advertised for rent in the last 6 months.
Units
$500/wk
5 units advertised for rent in the last 6 months.
13 rentals advertised against an estimated 454 rented homes (2.9%) in the last 6 months.
Rent agreed on new leases
Apr–Jun 2026- 3-bed houses
- $675/wk
- 10 bonds
- +50% since 2021
- 2-bed units
- $485/wk
- 10 bonds
- +68% since 2021
Median weekly rent on bonds lodged for new tenancies. Change since 2021 compares the median of the first four quarters with the last four. Asking rents above come from advertised listings.
Rental affordability
June quarter 2025101 Moderately unaffordable · the average rental household in this region would pay about 30% of its income on the median rent in postcode 5042.
SGS Rental Affordability Index: a score of 100 means rent takes 30% of income, the usual housing-stress line; lower scores are less affordable. "Region" is the capital city or the rest of the state.
Gross rental yield
Indicative$735/week ($38,000 a year) on a $1.03 million median
Based on a small sample (4 listings) — indicative only.
$500/week ($26,000 a year) on a $575,000 median
Based on a small sample (5 listings) — indicative only.
Gross yield — before strata, rates, management, insurance and vacancy. Calculated from median advertised rents and median asking prices over the last 6 months. How we calculate.
Is St Marys safe? Crime statistics
2026Crime in St Marys sits in the high band, with 294 incidents recorded in 2026 — up roughly 24% on the prior year.
294 offences
24.1% since 2025Crime Trend
Serious Road Crashes
2021–20258 crashes
where someone was killed or admitted to hospital
Crashes are counted where they happened, so a main road through the suburb carries people passing through; this is not a measure of risk to residents. This state’s crash data does not name the road.
Schools
One school serve St Marys, and performance is broadly on par with peer-suburb schools.
- • 205 students in one school (avg 205)
Primary
Universities nearby
- 1.0 kmTonsleyFlinders University · 63 courses
- 2.3 kmBedford ParkFlinders University · 399 courses
- 8.6 kmAdelaide University, Adelaide City CampusAdelaide University · 472 courses
3.2% of residents here are full-time university students aged 15–24.
Distance is measured to the suburb centre. A campus nearby does not by itself mean a student rental market — most suburbs within a few kilometres of one have a student share close to the national norm, and the figure above is what tells them apart.
Walkability
St Marys is somewhat walkable on foot — at 65/100, a short cluster of errands work on foot but most trips still benefit from a car.
Public transport
Weekday and weekend service frequency across every stop inside St Marys.
- Peak (7-9am + 5-7pm)
- 78.2 arrivals/hr
- Off-peak weekday
- 66.1 arrivals/hr
- Saturday
- 40.8 arrivals/hr
- Median peak wait
- 1 min
- Span of service
- 19.1 hours
Scheduled service only, based on the 21 October 2026 timetable. Reliability (delays, cancellations) not measured.
NBN connectivity
The internet access technology available across NBN premises in St Marys.
- Full-fibre (FTTP) share
- 48%
- Premises covered
- 1,612
NBN Co fixed-line and fixed-wireless premises, as at 30 December 2025. Higher-quality technologies (full fibre) score above copper, wireless, and satellite. Actual speeds depend on your plan.
Amenities
Mitcham: council population
The three add up to the change above. These are council-wide figures from the ABS, not figures for this suburb alone — this suburb's own population is in the census section above.
Socio-economic profile
The ABS scores 7 small areas inside this suburb and averages them into the single decile above. They fall into 3 different deciles — a narrow range, so the average describes the suburb closely.
St Marys is home to about 3,000 residents, with a median age of 35, broadly in line with the national figure. Median household income runs at $77,000 a year, with unemployment at 6.2%.
2021 Census · change since 2016
Population
3,010
Median Age
35
Median Household Income
$77,480/yr
Census Median Rent
$285/wk
Census Median Mortgage
$1,654/mo
Avg Household Size
2.4
Median Personal Income
$40,820/yr
Unemployment Rate
6.2%
Unoccupied Dwellings
5.6%
Total Dwellings
1,244
Owner-Occupier Rate
63.5%
Houses
66.6%
Rental Stress
19.1%
Mortgage Stress
25.6%
Work From Home
10.6%
Dwelling Types
Property Ownership
33 rented from a state or territory housing authority and 22 from a community housing provider, as a share of the 447 rented dwellings above — not of all dwellings.
Demographics
- Born in Australia
- 62.4%
- English Spoken at Home
- 62.8%
- Employment Rate
- 63.2%
- Completed Year 12
- 53.5%
Occupations
Religion
Country of Birth (overseas)
Largest overseas birthplaces, as a share of all residents.
When They Arrived
Share of all residents by the year they arrived in Australia. Periods cover different numbers of years, so compare the shape rather than the bar widths.
302 residents (10.0%) arrived since 2016. Australia’s borders were closed to most arrivals from March 2020, so the last two years of that period are much smaller than the ones before them — nationally 260,799 people arrived in 2019 against 28,521 in 2021.
Where New Residents Came From
Where residents aged five and over lived five years before the 2021 Census, for those who lived somewhere else.
Top places newcomers came from, as a share of the 2,808 residents aged five and over. Areas are ABS statistical regions. Small counts are approximate: the ABS adjusts every figure slightly to protect privacy.
Languages Spoken at Home
Top languages other than English, as a share of all residents.
Age Distribution
Family & Household Composition
Commute to Work
20% of employed residents work in a capital's city centre (313 of 1,590).
City centre: the ABS area around each capital's CBD, such as Sydney Inner City or Perth City (which takes in Subiaco and Leederville). 2021 Census place of work.
Local Jobs
People who work in this suburb against employed people who live here, 2021 Census.
About 1,946 people work here; 1,590 employed residents live here.
Roughly as many jobs as working residents (1.2 per resident). At least 18% of the people who work here must live elsewhere.
Counts are by place of work and place of usual residence. The ABS counts jobs in zones; where a zone spans several places, its jobs are shared out by land use. The ABS also adjusts every figure slightly to protect privacy.
Education
Cars per Dwelling
Council Rates
Households face an average residential rates bill of $2,296 a year through Mitcham based on 2024 figures.
How this land is zoned
- Residential 57%
- Industrial 20%
- Environmental 12%
- Parks and recreation 10%
- Infrastructure and transport 2%
Zoning sets what may be built, not what is there today. A single address can sit in a different zone to the suburb around it — the property page shows the zone for one address.
Building Approvals: Mitcham
In the year to August 2026, 188 new dwellings were approved across Mitcham. That mix is 131 houses and 57 units. Approvals are up 32.4% on the same period a year earlier.
Air Quality
MODERATEPM2.5 averaged 6 µg/m³ in 2025 — below Australia's NEPM annual standard (8 µg/m³), slightly above the stricter WHO guideline (5 µg/m³).
PM10 averaged 17.8 µg/m³ · NO₂ averaged 1.12 pphm. Days over the limit in 2025: PM10 0 · NO₂ 0.
From the Adelaide CBD monitoring station, 8.6 km away.
Climate & Setting
from Adelaide Airport M.o., 8.0 kmDry climate — hot summers, mild winters.
- Elevation
- 53 m
- above sea level, at the suburb centre
- Distance to the ocean
- 6.2 km
- Annual rainfall
- 394 mm
- 71 rainy days
- Summer max (Jan)
- 28.1°C
- 16 days ≥ 35°C
- Winter min (Jul)
- 7.8°C
- 0 frost days ≤ 0°C
Elevation is the ground at the suburb centre, from Geoscience Australia's National Digital Elevation Model. Approximate — it reads high in dense built-up areas. It is a measure of height above sea level and not an indicator of flood risk, which depends on height above nearby waterways.
Industrial Emissions Nearby
2 facilities within 5 km- 1.1 kmFuneral, Crematorium and Cemetery ServicesTop reported: Oxides of Nitrogen · Carbon monoxide · Total Volatile Organic Compounds
- 1.1 kmOther Motor Vehicle Parts ManufacturingTop reported: Total Volatile Organic Compounds · Toluene (methylbenzene) · Carbon monoxide
EV adoption
In postcode 5042, 140 of 9,223 registered light vehicles are battery-electric on 31 January 2025. A further 4.3% (397 vehicles) are hybrid or plug-in hybrid, taking the non-petrol, non-diesel share to 5.8%.
Rooftop solar
In postcode 5042, 2,625 rooftop-solar systems totalling 17.2 MW have been installed since 2001, against 4,843 dwellings recorded in the 2021 Census. 153 went up in the last year.
Counts every system certified since 2001, so a roof re-fitted with a newer system is counted twice, and small commercial systems are included alongside houses — useful for comparing postcodes, not an estimate of how many homes have working panels today.
2026 covers part of the year only, to 2026-07.
First Home Owner Grant
FY2026-27$15,000 for new homes.
No purchase-price cap. Stamp duty is fully exempted for eligible first-home buyers as a separate concession.
Mortgage repayments
3 mortgage brokers are registered in postcode 5042.
Conveyance duty at the owner-occupier rate, and it excludes first home buyer concessions — those can cut it substantially or remove it entirely. Excludes legal, inspection and lender fees. Check with RevenueSA
A deposit under 20% usually attracts Lenders Mortgage Insurance, which this doesn't include.
Principal and interest over 30 years, fixed rate. Excludes fees, offset, redraw and LMI. Default rate is the median comparison rate across 1788 advertised products as at 2026-10-26 — indicative only, and not an offer. Your rate depends on the lender, your deposit and your circumstances. Not financial advice.
Federal Electorate
Currently held by Louise Miller-Frost Australian Labor Party
| Year | Winner | 2PP ALP | 2PP LNP | Swing |
|---|---|---|---|---|
| 2025 | Louise Miller-Frost | 61.1% | 38.9% | +7.8 |
| 2022 | Louise Miller-Frost | 53.3% | 46.7% | -4.7 |
| 2019 | Nicolle Flint | 48.6% | 51.4% | -1.3 |
Results are per division — federal electoral boundaries are redrawn periodically, so the history reflects this division's past, not necessarily the exact suburb's voters across time.
State Electorate
Currently held by Nadia Clancy Australian Labor Party
Next state election: 16 March 2030.
| Year | Winner | Won with |
|---|---|---|
| 2026 | Nadia Clancy ALP | 69.1% |
| 2022 | Nadia Clancy ALP | 55.6% |
Results are per district. Districts were last redrawn in 2024, so results from before then describe the district of that name, not necessarily this suburb's voters. Results: Electoral Commission of South Australia.
Looking at a specific address in St Marys?
Every figure above is a suburb average, and an average smooths over the difference between a street of family homes and a block of flats. Look up one address and you get the census for the few hundred people around it, its own nearest schools and stops, and what the state has mapped for that block.
- The census for a few hundred neighbours, not all 3,010 residents
- Nearest and zoned schools, with the walk from that door
- Flood, bushfire and noise mapping, where the state publishes it
Free to look up. Subscribers see every section in full — $29/month.
Featured in
- #2 in Adelaide suburbs where the most Malayalam is spoken at home
- #4 in Adelaide suburbs where 2-bedroom unit rents rose most
- #10 in Adelaide suburbs where the most Arabic is spoken at home
- #11 in Where the Nepali community lives in Adelaide
- #12 in Adelaide suburbs where the most Nepali is spoken at home
- #15 in Best Adelaide suburbs for first-home buyers (units)
Checking the whole city?
Suburbs to avoid in Adelaide There is no list of bad suburbs, but there are hazards the state measures and publishes — recorded crime, bushfire exposure, flood overlays and aircraft noise. Adelaide suburbs ranked on them, with what the numbers do and don't mean.Nearby suburbs
Edwardstown SA 5039
Clovelly Park SA 5042
Pasadena SA 5042
Eden Hills SA 5050
Melrose Park SA 5039
Bedford Park SA 5042
Compare St Marys to another suburb
Side-by-side stats for any other SA suburb — type a name and pick one.
Or jump straight to a nearby comparison:
Common questions about St Marys
Is St Marys a safe place to live?
Recorded crime in St Marys is high (85/100, ranked against other SA suburbs on offences per resident). Offences against shops, venues and visitors are divided by the people who live here, so suburbs with large daytime or visitor populations rank higher than living there may feel.
What natural hazards affect St Marys?
St Marys has a low recorded bushfire history (21/100, ranked against every Australian suburb with any fire history). Flood overlays cover a high share of it (81/100). These are suburb-wide figures; check the address, as flood and bushfire exposure change street by street.
Is St Marys a good place to live?
St Marys has a SuburbScan Liveability grade of C (39/100), ranked against other SA suburbs on school quality (25%), safety (25%), SEIFA socio-economic advantage (25%), walkability (15%) and CBD access (10%). Whether it suits you depends on what you weigh — each of those is on this page.
What is the population of St Marys?
St Marys, SA had a population of 3,010 at the 2021 Australian Bureau of Statistics census.
What is the postcode for St Marys, SA?
The postcode for St Marys, SA is 5042.
How far is St Marys from Adelaide?
St Marys is 10 km from Adelaide CBD by road, about 17 minutes by car in normal traffic. Distance is the most-direct driving route, not straight-line.
What is the median household income in St Marys?
At the 2021 ABS Census, median household income in St Marys was $77,480 a year. It is the most recent suburb-level income figure until 2026 Census results are released in 2027.
What is the median weekly rent in St Marys?
The median advertised rent in St Marys is $735 a week for houses (8 listings) and $500 a week for units (5 listings), from rental listings over the last six months.
What is the median age in St Marys?
The median age of residents in St Marys was 35 at the 2021 ABS Census.
Is St Marys at risk of bushfire?
St Marys has a low recorded bushfire history (21/100). The score comes from Geoscience Australia's historical bushfire boundaries, with planned burns excluded: the area of recorded fires touching the suburb relative to its size, ranked against every Australian suburb with any fire history. It records where fire has burned, not a bushfire-prone land designation, which your council's planning scheme sets.
How are the schools in St Marys?
There is 1 school inside the St Marys boundary: 1 at similar schools on NAPLAN, compared with same-state, same-type schools of similar socio-educational advantage (ICSEA).
Is St Marys walkable?
St Marys scores 65/100 on the SuburbScan Walkability Score, making it somewhat walkable. The score is a weighted average of public transport, schools, parks, supermarkets, GPs, pharmacies, childcare, and hospitals within walking distance.
What is the air quality in St Marys?
The nearest government air-quality monitoring station to St Marys (Adelaide CBD) recorded a 2025 annual mean PM2.5 of 6.0 µg/m³ and PM10 of 17.8 µg/m³. That puts St Marys below the Australian NEPM annual standard of 8 µg/m³ but above the stricter WHO guideline of 5 µg/m³.
What is the weather like in St Marys?
At the nearest Bureau of Meteorology station to St Marys, Adelaide Airport M.o. (8 km away), summer days average 28.1°C, winter nights 7.8°C, 394 mm of rain a year over 71 rainy days, and 16 days a year above 35°C over 2006-2026.
Is the First Home Owner Grant available in St Marys?
First-home buyers in SA may be eligible for $15,000 towards new homes. The grant is administered by RevenueSA; confirm current eligibility before signing a contract — state rules and amounts can change.
What council does St Marys belong to?
St Marys sits within the Mitcham local government area. Council rates, planning approvals, and waste collection fall under this LGA.
How much are council rates in St Marys?
The average residential rates bill through Mitcham is $2,296 a year (2024). Every suburb in this LGA shares the same schedule — individual bills vary with land value.
How much is being built near St Marys?
Across Mitcham, 188 new residential dwellings were approved in the year to August 2026 (source: ABS Building Approvals). That's up 32.4% on the same period a year earlier. These are LGA-level totals — every suburb in the council shares the same figure.
Which federal electorate is St Marys in?
St Marys sits within the federal Division of Boothby, currently held by Louise Miller-Frost (Australian Labor Party).
Search another suburb or address
Data freshness
- Census · 2021
- Median sale prices · Oct 2026
- For-sale & rental market · Oct 2026
- Council rates · FY 2024–25
- Building approvals · Aug 2026
- Schools · 2025
- Public transport · Oct 2026
- NBN connectivity · Dec 2025
- Crime · 2026
- Road crashes · 2021–2025
- Air quality · 2025
- Climate · 2006–2026
- Socio-economic (SEIFA) · 2021
- EV adoption · Jan 2025
- First Home Owner Grant · Sep 2026
- Federal electorate · 2025
- State electorate · 2026
- Amenities · Sep 2026
- Health & emergency facilities · Sep 2026
- Industrial emissions (NPI) · 2024/2025
- Coastal erosion · 1988–2025
- Aircraft noise · 2024
Vintages show when each source's data is from. See all data sources.
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Information shown is provided as-is from Australian government and commercial data sources.
Always verify with the relevant authority before making property decisions.
See Data Sources and How We Calculate for details.