City of Marion
St Marys
St Marys at a glance
Median house
$1,115,500
+21.9% year on year
Median unit
$257,760
Sales data pending
Days on market
–
Average to sell
Walk score
16
Very car dependent
Population
3,010
Median age 35
About
Welcome to St Marys.
St Marys is a suburb in Australia.
Side by side
Compare St Marys with a nearby suburb.
Median, growth, schools, walkability, all in one view.
Market
The price of a home here.
Median house price
$1,115,500
+21.9% over the past year. Median unit price $257,760.
Sales data as of May 2026· sales-sa
Rental and ownership
Weekly rent (house)
$650/wk
Weekly rent (unit)
$450/wk
Owner occupied
62%
Renter occupied
36%
At a deeper level
$1,115,500
+21.9% annual growth
$257,760
Sales data pending
–
Average days to sell
3,010
Median age: 35
Rental data as of December 2025· rental-sa
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For investors
Investment overview.
Gross Yield (House)
Source: data.sa.gov.au · May 20263.03%
Based on $1,115,500 median
Gross Yield (Unit)
Source: data.sa.gov.au · May 20269.08%
Based on $257,760 median
Annual Growth (House)
Source: data.sa.gov.au · May 2026+21.9%
Year-on-year capital growth
Annual Growth (Unit)
Source: data.sa.gov.au · May 2026–
Year-on-year capital growth
Owner Occupancy
Source: ABS Census 2021 · May 202662%
Higher = more owner-occupier demand
Days on Market
Source: data.sa.gov.au · May 2026–
Lower = higher buyer demand
Gross rental yield is annual rent divided by purchase price, before expenses. It does not account for vacancy rates, management fees, maintenance, or financing costs. Use this as a starting point for further research.
5-year trajectory
at +21.9%/yr
2021
$414K
5-year change
+169%
2026
$1.1M
Trajectory derived from the current median compounded at the suburb’s annual growth rate, not raw sale-by-sale history.
Who lives here
Demographics.
Population
3,010
Median age
35
Family households
63%
Lone person
32%
Demographics data as of May 2026· ABS 2021 Census
Safety
Crime and safety.
136
total offences in 2025-26
Top offence categories
Crime statistics are reported at LGA level and may cover a broader area than this suburb.
Source: State Police Open Data
Crime data as of June 2026· State Police Open Data
Getting around
Walkability.
16
0
100
Scores calculated from OpenStreetMap data (ODbL)
Walkability data as of May 2026· OpenStreetMap
Place
Location.
Amenities
Transport
Education
Schools in St Marys.
Local schools for St Marys
View the catchment for each school to find out more.
Government School Catchment
Clovelly Park Primary School
Hamilton Secondary College
Springbank Secondary College
© ACARA, licensed under CC BY 4.0.
Climate
Weather year-round.
Annual Rainfall
448 mm
Hottest Month (avg max)
28.0°C
Coldest Month (avg min)
7.0°C
Monthly Rainfall (mm)
Weather data from BOM station Adelaide (Kent Town) (11 km away)
Climate data as of May 2026· Bureau of Meteorology
Frequently asked
About St Marys.
- What is the median house price in St Marys?
- The median house price in St Marys, SA 5042 is $1,115,500. The median unit price is $257,760. Annual growth is +21.9%.
- What is the St Marys postcode?
- St Marys is in the 5042 postcode, in SA, in the City of Marion region.
- What is the average rent in St Marys?
- The median weekly rent for houses is $650, for units it's $450.
- What schools are in St Marys?
- There are 20 schools serving St Marys on this page, including St Bernadette's School, Clovelly Park Primary School, Hamilton Secondary College.
- How walkable is St Marys?
- St Marys has a Walk Score of 16 out of 100, highly car-dependent. transit score 0, bike score 100.
- What suburbs are near St Marys?
- St Marys is close to Flinders University, Clovelly Park, Tonsley, Pasadena, Mitchell Park.
- What is the population of St Marys?
- St Marys has approximately 3,010 residents. The median age is 35.
St Marys
Guides
Surrounding Suburbs
Side by side
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Sources cited
Median, growth and rental data from state revenue offices and ABS. Census from ABS 2021. Climate from BoM. Hazard from Geoscience Australia. School data from ACARA. Crime from state police open data. Full methodology →
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