Aldinga SA

Postcode 5173 · Onkaparinga LGA

Aldinga is a small community in South Australia within the Onkaparinga local government area (postcode 5173). With a population of 764, the suburb has a mature demographic with a median age of 49. Households earn a median income of $57K per year, with an average household size of 2.1 people. The most common occupations are professionals, community & personal service, clerical & administrative. The top ancestries reported are English, Australian, Scottish.

The median house price in Aldinga is $725,000, having dropped significantly 11% over the past year. Units have a median price of $595,000 (+13.3% YoY). The current median weekly rent is $548. This gives a gross rental yield of approximately 3.9%. The median monthly mortgage repayment is $1,517.

Aldinga is served by 2 schools, including 1 primary, 1 combined. The average ICSEA score is 956, which is around the national average of 1,000. Public transport access includes 18 bus stops. The crime rate in the Onkaparinga LGA is higher than average at 11,911 incidents per 100,000 population.

From an investment perspective, Aldinga offers a gross rental yield of 3.9%, rated as moderate yield. Property prices are near the state median ($725K/$950K). The price-to-income ratio of 12.7x is considered stretched. House prices have moved -11.0% year-on-year.

INVESTMENT SIGNALS
Rental Yield3.9% Moderate Yield
Price vs State$725K/$950K Near Median
Affordability12.7x Stretched
Price Momentum-11.0% Falling
INCOME (ATO 2022-23)
Median Income$50,165
Mean Income$57,242
Earners9,838
YoY Change+3.6%
SEIFA INDEX (ABS)
Advantage4/10
Education8/10
Economic4/10
Disadvantage5/10
MEDIAN HOUSE
$725K
-11% YoY
MEDIAN UNIT
$595K
13.3% YoY
MEDIAN RENT /WK
$255
POPULATION
764
DEMOGRAPHICS
Median Age49
Household Size2.1
HH Income /wk$1,102
Personal Income /wk$627
Mortgage /mth$1,517
CRIME (Onkaparinga LGA)
Crime Rate (per 100k)11,911
Total Incidents91
TRANSPORT
Bus Stops18
SCHOOLS (2)
Avg ICSEA956
Total Students1,208
Government2
Aldinga Payinthi CollegeCombined · Government · ICSEA 954
Aldinga Beach Primary SchoolPrimary · Government · ICSEA 959
Data: 2025-Q3