St Marys, SA 5042 — Suburb Profile
Last reviewed: · By Knowburb Research Team
In short
St Marys is a suburb of South Australia, postcode 5042, home to 3,010 residents with a balanced age mix. Located in the Marion local government area and roughly 9 km from the Adelaide CBD.
Snapshot
Demographics
- Population
- 3,010
- Median age
- 35 years
- Median household income
- $1,490 /week
- Median personal income
- $785 /week
- Median family income
- $2,002 /week
- Average household size
- 2.4
- Persons per bedroom
- 0.8
- Local government area
- Mitcham
- Statistical region (SA4)
- Adelaide - South
- Remoteness classification
- Major Cities of Australia
- Federal electorate
- Boothby
Property & cost of living
- Median rent
- $285 /week
- Median monthly mortgage
- $1,654
- Rent share of household income
- 19%
Schools
- St Bernadette's School
- Australian Science & Mathematics School
- Clovelly Park Primary School
- Sacred Heart College Middle School
- Suneden Special School
Transport
- Within 800 m walk: 2 train stops, 8 bus stops
- Within 1.6 km: 6 train stops, 77 bus stops
- Stop 23 South Rd - West side
- Stop 23 South Rd - East side
- Stop 22 York Av - West side
- Stop 21 South Rd - East side
- Tonsley Railway Station
Lifestyle & amenities
- 3 cafés
- 4 restaurants
- 83 parks and reserves
- 2 gyms and fitness centres
- 2 libraries
- 2 supermarkets
- 9 playgrounds
Climate
- Warmest month: Jan (28.3°C avg max)
- Coolest month: Jul (15.0°C avg max)
- Annual rainfall: 437 mm
- Reference station: Adelaide Airport, 8.1 km away
NBN & connectivity
Fibre to the Node serves 53.8% of the 1,800 resolvable premises in St Marys. Most premises here connect via fibre to a street cabinet, then copper into the home. Speeds depend heavily on the copper run length — NBN 100 is rarely achievable on long runs.
- Fibre to the Premises: 46.1%
- Fibre to the Building: 0.1%
- Fibre to the Node: 53.8%
Safety
- Recorded offences: 822 across postcode 5042 in the year to FY2024–25 (down 23% on the prior year).
- Most common categories: 392 theft, 156 violent offences, 142 property damage.
Frequently asked questions
What is the population of St Marys?
St Marys (SA 5042) had 3,010 residents at the most recent ABS Census. The median age is 35. It sits within the Mitcham local government area.
What is the median rent in St Marys?
The median advertised rent in St Marys is $285/week, based on SQM Research listings data. Rents vary by property type, bedrooms and condition.
Are there schools in St Marys?
Yes — 5 schools are listed within or near St Marys covering independent, government sectors. Nearest include: St Bernadette's School (0.4 km), Australian Science & Mathematics School (1.3 km), Clovelly Park Primary School (1.3 km). School data sourced from ACARA and state education departments.
What NBN technology is available in St Marys?
St Marys is predominantly served by Fibre to the Node (53.8% of premises). Coverage data is sourced from the NBN upgrade map aggregated from NBN Co address checks.
How safe is St Marys?
Across postcode 5042, 822 offences were recorded in the 12 months to FY2024–25. The most common offence categories were theft (392), violent (156), property damage (142). Crime statistics are recorded by area (postcode or LGA), not by individual suburb. Data sourced from each state's crime statistics agency.
What is the climate like in St Marys?
In St Marys, mean daily temperatures range from 11.5°C to 21.6°C and annual rainfall is 437 mm measured at the Adelaide Airport weather station (8.1 km away). Long-term averages from the Bureau of Meteorology.
What public transport options are in St Marys?
83 public transport stops are mapped within 1.6 km of the St Marys centroid. Within 800 m, you'll find 8 bus stops, 2 train stops. Stop data is sourced from state government GTFS feeds.
Sources & methodology
Demographics from ABS Census. Property data from SQM Research. Climate from Bureau of Meteorology. Schools from ACARA. NBN from NBN Co. Amenities from OpenStreetMap. See full methodology.
Additional sources for this profile: